634590678544 has 15 divisors (see below), whose sum is σ = 1229525613453. Its totient is φ = 317293746048.

The previous prime is 634590678517. The next prime is 634590678559. The reversal of 634590678544 is 445876095436.

The square root of 634590678544 is 796612.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 494630890000 + 139959788544 = 703300^2 + 374112^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3086872 + ... + 3286024.

Almost surely, 2^634590678544 is an apocalyptic number.

634590678544 is the 796612-nd square number.

It is an amenable number.

634590678544 is a deficient number, since it is larger than the sum of its proper divisors (594934934909).

634590678544 is an frugal number, since it uses more digits than its factorization.

634590678544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398314 (or 199155 counting only the distinct ones).

The product of its (nonzero) digits is 87091200, while the sum is 61.

The spelling of 634590678544 in words is "six hundred thirty-four billion, five hundred ninety million, six hundred seventy-eight thousand, five hundred forty-four".