156264461809 has 3 divisors (see below), whose sum is σ = 156264857113. Its totient is φ = 156264066506.

The previous prime is 156264461777. The next prime is 156264461813. The reversal of 156264461809 is 908164462651.

The square root of 156264461809 is 395303.

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

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.

It is not a de Polignac number, because 156264461809 - 2⁵ = 156264461777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (156264461849) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 197652 + ... + 592954.

Almost surely, 2^156264461809 is an apocalyptic number.

156264461809 is the 395303-rd square number.

156264461809 is the 197652-nd centered octagonal number.

It is an amenable number.

156264461809 is a deficient number, since it is larger than the sum of its proper divisors (395304).

156264461809 is an frugal number, since it uses more digits than its factorization.

156264461809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790606 (or 395303 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 52.

The spelling of 156264461809 in words is "one hundred fifty-six billion, two hundred sixty-four million, four hundred sixty-one thousand, eight hundred nine".