156307331740781 has 16 divisors (see below), whose sum is σ = 169424146447920. Its totient is φ = 143347868590080.

The previous prime is 156307331740739. The next prime is 156307331740787. The reversal of 156307331740781 is 187047133703651.

It can be written as a sum of positive squares in 8 ways, for example, as 23177157118756 + 133130174622025 = 4814266^2 + 11538205^2 .

It is a cyclic number.

It is not a de Polignac number, because 156307331740781 - 2³⁴ = 156290151871597 is a prime.

It is a super-2 number, since 2×156307331740781² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156307331740787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21494330 + ... + 27832011.

It is an arithmetic number, because the mean of its divisors is an integer number (10589009152995).

Almost surely, 2^{156307331740781} is an apocalyptic number.

It is an amenable number.

156307331740781 is a deficient number, since it is larger than the sum of its proper divisors (13116814707139).

156307331740781 is a wasteful number, since it uses less digits than its factorization.

156307331740781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49327936.

The product of its (nonzero) digits is 8890560, while the sum is 56.

The spelling of 156307331740781 in words is "one hundred fifty-six trillion, three hundred seven billion, three hundred thirty-one million, seven hundred forty thousand, seven hundred eighty-one".