390971677491 has 12 divisors (see below), whose sum is σ = 567662967768. Its totient is φ = 259297277184.

The previous prime is 390971677483. The next prime is 390971677511. The reversal of 390971677491 is 194776179093.

390971677491 is a `hidden beast` number, since 3 + 9 + 0 + 9 + 71 + 6 + 77 + 491 = 666.

It is not a de Polignac number, because 390971677491 - 2³ = 390971677483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (390971677451) 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, 112540485 + ... + 112543958.

It is an arithmetic number, because the mean of its divisors is an integer number (47305247314).

Almost surely, 2^390971677491 is an apocalyptic number.

390971677491 is a deficient number, since it is larger than the sum of its proper divisors (176691290277).

390971677491 is a wasteful number, since it uses less digits than its factorization.

390971677491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225084642 (or 225084639 counting only the distinct ones).

The product of its (nonzero) digits is 18003384, while the sum is 63.

The spelling of 390971677491 in words is "three hundred ninety billion, nine hundred seventy-one million, six hundred seventy-seven thousand, four hundred ninety-one".