156438237812 has 12 divisors (see below), whose sum is σ = 274061612580. Its totient is φ = 78134919936.

The previous prime is 156438237773. The next prime is 156438237841. The reversal of 156438237812 is 218732834651.

It can be written as a sum of positive squares in 2 ways, for example, as 17783289316 + 138654948496 = 133354^2 + 372364^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21045563 + ... + 21052994.

It is an arithmetic number, because the mean of its divisors is an integer number (22838467715).

Almost surely, 2^156438237812 is an apocalyptic number.

It is an amenable number.

156438237812 is a deficient number, since it is larger than the sum of its proper divisors (117623374768).

156438237812 is a wasteful number, since it uses less digits than its factorization.

156438237812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42099490 (or 42099488 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 50.

The spelling of 156438237812 in words is "one hundred fifty-six billion, four hundred thirty-eight million, two hundred thirty-seven thousand, eight hundred twelve".