31645695601 has 4 divisors (see below), whose sum is σ = 34079979892. Its totient is φ = 29211411312.

The previous prime is 31645695581. The next prime is 31645695617. The reversal of 31645695601 is 10659654613.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10659654613 = 29 ⋅367574297.

It can be written as a sum of positive squares in 2 ways, for example, as 1313990001 + 30331705600 = 36249^2 + 174160^2 .

It is a cyclic number.

It is not a de Polignac number, because 31645695601 - 2⁵ = 31645695569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31645695661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1217142126 + ... + 1217142151.

It is an arithmetic number, because the mean of its divisors is an integer number (8519994973).

Almost surely, 2^31645695601 is an apocalyptic number.

It is an amenable number.

31645695601 is a deficient number, since it is larger than the sum of its proper divisors (2434284291).

31645695601 is a wasteful number, since it uses less digits than its factorization.

31645695601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2434284290.

The product of its (nonzero) digits is 583200, while the sum is 46.

The spelling of 31645695601 in words is "thirty-one billion, six hundred forty-five million, six hundred ninety-five thousand, six hundred one".