647194964 has 72 divisors (see below), whose sum is σ = 1309694400. Its totient is φ = 278733312.

The previous prime is 647194949. The next prime is 647194993. The reversal of 647194964 is 469491746.

It is a super-2 number, since 2×647194964² = 837722642853922592, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2286767 + ... + 2287049.

It is an arithmetic number, because the mean of its divisors is an integer number (18190200).

Almost surely, 2^647194964 is an apocalyptic number.

It is an amenable number.

647194964 is an abundant number, since it is smaller than the sum of its proper divisors (662499436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

647194964 is a wasteful number, since it uses less digits than its factorization.

647194964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529 (or 514 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 50.

The square root of 647194964 is about 25440.0268081620. The cubic root of 647194964 is about 864.9912409596.

The spelling of 647194964 in words is "six hundred forty-seven million, one hundred ninety-four thousand, nine hundred sixty-four".