51564447948 has 48 divisors (see below), whose sum is σ = 134040221280. Its totient is φ = 15318879744.

The previous prime is 51564447877. The next prime is 51564447967. The reversal of 51564447948 is 84974446515.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5694465 + ... + 5703512.

It is an arithmetic number, because the mean of its divisors is an integer number (2792504610).

Almost surely, 2^51564447948 is an apocalyptic number.

51564447948 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is an amenable number.

51564447948 is an abundant number, since it is smaller than the sum of its proper divisors (82475773332).

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

51564447948 is a wasteful number, since it uses less digits than its factorization.

51564447948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11398026 (or 11398024 counting only the distinct ones).

The product of its digits is 19353600, while the sum is 57.

The spelling of 51564447948 in words is "fifty-one billion, five hundred sixty-four million, four hundred forty-seven thousand, nine hundred forty-eight".