551646801964 has 48 divisors (see below), whose sum is σ = 1015842643200. Its totient is φ = 261735311936.

The previous prime is 551646801947. The next prime is 551646801973. The reversal of 551646801964 is 469108646155.

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, 40968297 + ... + 40981759.

It is an arithmetic number, because the mean of its divisors is an integer number (21163388400).

Almost surely, 2^551646801964 is an apocalyptic number.

It is an amenable number.

551646801964 is a deficient number, since it is larger than the sum of its proper divisors (464195841236).

551646801964 is a wasteful number, since it uses less digits than its factorization.

551646801964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19542 (or 19540 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 55.

The spelling of 551646801964 in words is "five hundred fifty-one billion, six hundred forty-six million, eight hundred one thousand, nine hundred sixty-four".