5257720056 has 32 divisors (see below), whose sum is σ = 13152626640. Its totient is φ = 1751463168.

The previous prime is 5257720021. The next prime is 5257720079. The reversal of 5257720056 is 6500277525.

It is a junction number, because it is equal to n+sod(n) for n = 5257719996 and 5257720023.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30261 + ... + 106916.

Almost surely, 2^5257720056 is an apocalyptic number.

It is an amenable number.

5257720056 is an abundant number, since it is smaller than the sum of its proper divisors (7894906584).

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

5257720056 is a wasteful number, since it uses less digits than its factorization.

5257720056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138783 (or 138779 counting only the distinct ones).

The product of its (nonzero) digits is 147000, while the sum is 39.

The square root of 5257720056 is about 72510.1376084751. The cubic root of 5257720056 is about 1738.8648137933.

The spelling of 5257720056 in words is "five billion, two hundred fifty-seven million, seven hundred twenty thousand, fifty-six".