647007879424 has 27 divisors (see below), whose sum is σ = 1291514074333. Its totient is φ = 323497504768.

The previous prime is 647007879373. The next prime is 647007879449. The reversal of 647007879424 is 424978700746.

The square root of 647007879424 is 804368.

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., 401753145600 + 245254733824 = 633840^2 + 495232^2 .

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, 12844752 + ... + 12895024.

Almost surely, 2^647007879424 is an apocalyptic number.

647007879424 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

647007879424 is the 804368-th square number.

It is an amenable number.

647007879424 is a deficient number, since it is larger than the sum of its proper divisors (644506194909).

647007879424 is an frugal number, since it uses more digits than its factorization.

647007879424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100562 (or 50275 counting only the distinct ones).

The product of its (nonzero) digits is 18966528, while the sum is 58.

The spelling of 647007879424 in words is "six hundred forty-seven billion, seven million, eight hundred seventy-nine thousand, four hundred twenty-four".