156231064840 has 32 divisors (see below), whose sum is σ = 351531469080. Its totient is φ = 62490368512.

The previous prime is 156231064819. The next prime is 156231064849. The reversal of 156231064840 is 48460132651.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 109670919556 + 46560145284 = 331166^2 + 215778^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 156231064793 and 156231064802.

It is not an unprimeable number, because it can be changed into a prime (156231064849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1928022 + ... + 2007418.

Almost surely, 2^156231064840 is an apocalyptic number.

156231064840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

156231064840 is an abundant number, since it is smaller than the sum of its proper divisors (195300404240).

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

156231064840 is a wasteful number, since it uses less digits than its factorization.

156231064840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128601 (or 128597 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 156231064840 in words is "one hundred fifty-six billion, two hundred thirty-one million, sixty-four thousand, eight hundred forty".