31318728412995 has 64 divisors (see below), whose sum is σ = 57303617011200. Its totient is φ = 16222380416640.

The previous prime is 31318728412991. The next prime is 31318728413051. The reversal of 31318728412995 is 59921482781313.

It is a happy number.

31318728412995 is a `hidden beast` number, since 3 + 1 + 31 + 87 + 28 + 412 + 9 + 95 = 666.

It is not a de Polignac number, because 31318728412995 - 2² = 31318728412991 is a prime.

It is a super-2 number, since 2×31318728412995² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31318728412991) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 23025916 + ... + 24348105.

It is an arithmetic number, because the mean of its divisors is an integer number (895369015800).

Almost surely, 2^{31318728412995} is an apocalyptic number.

31318728412995 is a deficient number, since it is larger than the sum of its proper divisors (25984888598205).

31318728412995 is a wasteful number, since it uses less digits than its factorization.

31318728412995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47374177 (or 47374171 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 63.

The spelling of 31318728412995 in words is "thirty-one trillion, three hundred eighteen billion, seven hundred twenty-eight million, four hundred twelve thousand, nine hundred ninety-five".