31358463697 has 6 divisors (see below), whose sum is σ = 34468394114. Its totient is φ = 28507694160.

The previous prime is 31358463659. The next prime is 31358463709. The reversal of 31358463697 is 79636485313.

It can be written as a sum of positive squares in only one way, i.e., 27585555921 + 3772907776 = 166089^2 + 61424^2 .

It is a de Polignac number, because none of the positive numbers 2^k-31358463697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31358463637) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 129580308 + ... + 129580549.

Almost surely, 2^31358463697 is an apocalyptic number.

It is an amenable number.

31358463697 is a deficient number, since it is larger than the sum of its proper divisors (3109930417).

31358463697 is a wasteful number, since it uses less digits than its factorization.

31358463697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259160879 (or 259160868 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 55.

The spelling of 31358463697 in words is "thirty-one billion, three hundred fifty-eight million, four hundred sixty-three thousand, six hundred ninety-seven".