891732930664 has 64 divisors (see below), whose sum is σ = 1706116608000. Its totient is φ = 436865058240.

The previous prime is 891732930631. The next prime is 891732930731. The reversal of 891732930664 is 466039237198.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 891732930599 and 891732930608.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56895549 + ... + 56911219.

It is an arithmetic number, because the mean of its divisors is an integer number (26658072000).

Almost surely, 2^891732930664 is an apocalyptic number.

It is an amenable number.

891732930664 is a deficient number, since it is larger than the sum of its proper divisors (814383677336).

891732930664 is a wasteful number, since it uses less digits than its factorization.

891732930664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16438 (or 16434 counting only the distinct ones).

The product of its (nonzero) digits is 11757312, while the sum is 58.

The spelling of 891732930664 in words is "eight hundred ninety-one billion, seven hundred thirty-two million, nine hundred thirty thousand, six hundred sixty-four".