31207046643 has 12 divisors (see below), whose sum is σ = 45103029400. Its totient is φ = 20792612736.

The previous prime is 31207046627. The next prime is 31207046657. The reversal of 31207046643 is 34664070213.

It is a happy number.

31207046643 is a `hidden beast` number, since 3 + 1 + 2 + 0 + 7 + 0 + 4 + 6 + 643 = 666.

It is not a de Polignac number, because 31207046643 - 2⁴ = 31207046627 is a prime.

It is a super-3 number, since 3×31207046643³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31207046598 and 31207046607.

It is not an unprimeable number, because it can be changed into a prime (31207046683) 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, 990718 + ... + 1021731.

Almost surely, 2^31207046643 is an apocalyptic number.

31207046643 is a deficient number, since it is larger than the sum of its proper divisors (13895982757).

31207046643 is a wasteful number, since it uses less digits than its factorization.

31207046643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2014178 (or 2014175 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 36.

The spelling of 31207046643 in words is "thirty-one billion, two hundred seven million, forty-six thousand, six hundred forty-three".