156728547899 has 32 divisors (see below), whose sum is σ = 208475638272. Its totient is φ = 114064704000.

The previous prime is 156728547881. The next prime is 156728547919. The reversal of 156728547899 is 998745827651.

It is a cyclic number.

It is not a de Polignac number, because 156728547899 - 2²⁸ = 156460112443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (156728549899) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 285512 + ... + 628469.

It is an arithmetic number, because the mean of its divisors is an integer number (6514863696).

Almost surely, 2^156728547899 is an apocalyptic number.

156728547899 is a deficient number, since it is larger than the sum of its proper divisors (51747090373).

156728547899 is a wasteful number, since it uses less digits than its factorization.

156728547899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914147.

The product of its digits is 304819200, while the sum is 71.

The spelling of 156728547899 in words is "one hundred fifty-six billion, seven hundred twenty-eight million, five hundred forty-seven thousand, eight hundred ninety-nine".