31657064543 has 32 divisors (see below), whose sum is σ = 35300966400. Its totient is φ = 28199961216.

The previous prime is 31657064519. The next prime is 31657064557. The reversal of 31657064543 is 34546075613.

It is a cyclic number.

It is not a de Polignac number, because 31657064543 - 2⁶ = 31657064479 is a prime.

It is a super-3 number, since 3×31657064543³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31657064494 and 31657064503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31657064563) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44028938 + ... + 44029656.

It is an arithmetic number, because the mean of its divisors is an integer number (1103155200).

Almost surely, 2^31657064543 is an apocalyptic number.

31657064543 is a deficient number, since it is larger than the sum of its proper divisors (3643901857).

31657064543 is a wasteful number, since it uses less digits than its factorization.

31657064543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1391.

The product of its (nonzero) digits is 907200, while the sum is 44.

The spelling of 31657064543 in words is "thirty-one billion, six hundred fifty-seven million, sixty-four thousand, five hundred forty-three".