647976857088 has 80 divisors (see below), whose sum is σ = 1883182790016. Its totient is φ = 196356618240.

The previous prime is 647976856873. The next prime is 647976857093. The reversal of 647976857088 is 880758679746.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19158556 + ... + 19192347.

Almost surely, 2^647976857088 is an apocalyptic number.

It is an amenable number.

647976857088 is an abundant number, since it is smaller than the sum of its proper divisors (1235205932928).

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

647976857088 is a wasteful number, since it uses less digits than its factorization.

647976857088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38350935 (or 38350919 counting only the distinct ones).

The product of its (nonzero) digits is 1137991680, while the sum is 75.

The spelling of 647976857088 in words is "six hundred forty-seven billion, nine hundred seventy-six million, eight hundred fifty-seven thousand, eighty-eight".