156169603489 has 9 divisors (see below), whose sum is σ = 161752327347. Its totient is φ = 150773379624.

The previous prime is 156169603463. The next prime is 156169603507. The reversal of 156169603489 is 984306961651.

It is a happy number.

The square root of 156169603489 is 395183.

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

It can be written as a sum of positive squares in only one way, i.e., 81891551889 + 74278051600 = 286167^2 + 272540^2 .

It is not a de Polignac number, because 156169603489 - 2⁷ = 156169603361 is a prime.

It is a super-2 number, since 2×156169603489² (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 (156163603489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 11453494 + ... + 11467120.

Almost surely, 2^156169603489 is an apocalyptic number.

156169603489 is the 395183-rd square number.

156169603489 is the 197592-nd centered octagonal number.

It is an amenable number.

156169603489 is a deficient number, since it is larger than the sum of its proper divisors (5582723858).

156169603489 is an frugal number, since it uses more digits than its factorization.

156169603489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27312 (or 13656 counting only the distinct ones).

The product of its (nonzero) digits is 8398080, while the sum is 58.

The spelling of 156169603489 in words is "one hundred fifty-six billion, one hundred sixty-nine million, six hundred three thousand, four hundred eighty-nine".