156897586609 has 3 divisors (see below), whose sum is σ = 156897982713. Its totient is φ = 156897190506.

The previous prime is 156897586597. The next prime is 156897586633. The reversal of 156897586609 is 906685798651.

The square root of 156897586609 is 396103.

It is a perfect power (a square), and thus also a powerful number.

156897586609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 906685798651 = 197 ⋅4602465983.

It is not a de Polignac number, because 156897586609 - 2¹¹ = 156897584561 is a prime.

It is a super-2 number, since 2×156897586609² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (156897586649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 198052 + ... + 594154.

It is an arithmetic number, because the mean of its divisors is an integer number (52299327571).

Almost surely, 2^156897586609 is an apocalyptic number.

156897586609 is the 396103-rd square number.

156897586609 is the 198052-nd centered octagonal number.

It is an amenable number.

156897586609 is a deficient number, since it is larger than the sum of its proper divisors (396104).

156897586609 is an frugal number, since it uses more digits than its factorization.

156897586609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792206 (or 396103 counting only the distinct ones).

The product of its (nonzero) digits is 195955200, while the sum is 70.

The spelling of 156897586609 in words is "one hundred fifty-six billion, eight hundred ninety-seven million, five hundred eighty-six thousand, six hundred nine".