156856394600 has 72 divisors (see below), whose sum is σ = 368838536610. Its totient is φ = 62036958720.

The previous prime is 156856394593. The next prime is 156856394621. The reversal of 156856394600 is 6493658651.

It is a happy number.

It is a Cunningham number, because it is equal to 396051²-1.

It can be written as a sum of positive squares in 9 ways, for example, as 32356094884 + 124500299716 = 179878^2 + 352846^2 .

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 1534694 + ... + 1633706.

Almost surely, 2^156856394600 is an apocalyptic number.

156856394600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 156856394600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184419268305).

156856394600 is an abundant number, since it is smaller than the sum of its proper divisors (211982142010).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

156856394600 is an equidigital number, since it uses as much as digits as its factorization.

156856394600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99207 (or 99109 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 53.

The spelling of 156856394600 in words is "one hundred fifty-six billion, eight hundred fifty-six million, three hundred ninety-four thousand, six hundred".