31140664641 has 12 divisors (see below), whose sum is σ = 44990525268. Its totient is φ = 20756028384.

The previous prime is 31140664627. The next prime is 31140664649. The reversal of 31140664641 is 14646604113.

31140664641 is a `hidden beast` number, since 3 + 1 + 1 + 4 + 0 + 6 + 6 + 4 + 641 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10977800625 + 20162864016 = 104775^2 + 141996^2 .

It is not a de Polignac number, because 31140664641 - 2³⁰ = 30066922817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31140664596 and 31140664605.

It is not an unprimeable number, because it can be changed into a prime (31140664649) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 322930 + ... + 408123.

It is an arithmetic number, because the mean of its divisors is an integer number (3749210439).

Almost surely, 2^31140664641 is an apocalyptic number.

It is an amenable number.

31140664641 is a deficient number, since it is larger than the sum of its proper divisors (13849860627).

31140664641 is a wasteful number, since it uses less digits than its factorization.

31140664641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735792 (or 735789 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The spelling of 31140664641 in words is "thirty-one billion, one hundred forty million, six hundred sixty-four thousand, six hundred forty-one".