27864700520 has 16 divisors (see below), whose sum is σ = 62695576260. Its totient is φ = 11145880192.

The previous prime is 27864700471. The next prime is 27864700559. The reversal of 27864700520 is 2500746872.

It can be written as a sum of positive squares in 2 ways, for example, as 26177298436 + 1687402084 = 161794^2 + 41078^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348308717 + ... + 348308796.

Almost surely, 2^27864700520 is an apocalyptic number.

27864700520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27864700520 is an abundant number, since it is smaller than the sum of its proper divisors (34830875740).

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

27864700520 is a wasteful number, since it uses less digits than its factorization.

27864700520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696617524 (or 696617520 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 41.

The spelling of 27864700520 in words is "twenty-seven billion, eight hundred sixty-four million, seven hundred thousand, five hundred twenty".