684736874632 has 8 divisors (see below), whose sum is σ = 1283881639950. Its totient is φ = 342368437312.

The previous prime is 684736874623. The next prime is 684736874683. The reversal of 684736874632 is 236478637486.

It can be written as a sum of positive squares in only one way, i.e., 684699981156 + 36893476 = 827466^2 + 6074^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42796054657 + ... + 42796054672.

Almost surely, 2^684736874632 is an apocalyptic number.

It is an amenable number.

684736874632 is a deficient number, since it is larger than the sum of its proper divisors (599144765318).

684736874632 is a wasteful number, since it uses less digits than its factorization.

684736874632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85592109335 (or 85592109331 counting only the distinct ones).

The product of its digits is 195084288, while the sum is 64.

The spelling of 684736874632 in words is "six hundred eighty-four billion, seven hundred thirty-six million, eight hundred seventy-four thousand, six hundred thirty-two".