6555913864 has 72 divisors (see below), whose sum is σ = 13367661930. Its totient is φ = 3003819520.

The previous prime is 6555913849. The next prime is 6555913907. The reversal of 6555913864 is 4683195556.

It can be written as a sum of positive squares in 3 ways, for example, as 6554197764 + 1716100 = 80958^2 + 1310^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 50045079 + ... + 50045209.

Almost surely, 2^6555913864 is an apocalyptic number.

It is an amenable number.

6555913864 is an abundant number, since it is smaller than the sum of its proper divisors (6811748066).

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

6555913864 is a wasteful number, since it uses less digits than its factorization.

6555913864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391 (or 203 counting only the distinct ones).

The product of its digits is 3888000, while the sum is 52.

The square root of 6555913864 is about 80968.5980118218. The cubic root of 6555913864 is about 1871.5915667556.

The spelling of 6555913864 in words is "six billion, five hundred fifty-five million, nine hundred thirteen thousand, eight hundred sixty-four".