31537697468 has 12 divisors (see below), whose sum is σ = 55329993432. Its totient is φ = 15729127920.

The previous prime is 31537697467. The next prime is 31537697489. The reversal of 31537697468 is 86479673513.

It is a super-2 number, since 2×31537697468² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31537697467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9928418 + ... + 9931593.

It is an arithmetic number, because the mean of its divisors is an integer number (4610832786).

Almost surely, 2^31537697468 is an apocalyptic number.

It is an amenable number.

31537697468 is a deficient number, since it is larger than the sum of its proper divisors (23792295964).

31537697468 is a wasteful number, since it uses less digits than its factorization.

31537697468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19860412 (or 19860410 counting only the distinct ones).

The product of its digits is 22861440, while the sum is 59.

The spelling of 31537697468 in words is "thirty-one billion, five hundred thirty-seven million, six hundred ninety-seven thousand, four hundred sixty-eight".