31161563356040 has 64 divisors (see below), whose sum is σ = 75575696762160. Its totient is φ = 11495319367680.

The previous prime is 31161563356039. The next prime is 31161563356057. The reversal of 31161563356040 is 4065336516113.

It can be written as a sum of positive squares in 8 ways, for example, as 867085018276 + 30294478337764 = 931174^2 + 5504042^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31161563355982 and 31161563356000.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26743181 + ... + 27884060.

Almost surely, 2^{31161563356040} is an apocalyptic number.

It is an amenable number.

31161563356040 is an abundant number, since it is smaller than the sum of its proper divisors (44414133406120).

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

31161563356040 is a wasteful number, since it uses less digits than its factorization.

31161563356040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54628362 (or 54628358 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 44.

The spelling of 31161563356040 in words is "thirty-one trillion, one hundred sixty-one billion, five hundred sixty-three million, three hundred fifty-six thousand, forty".