70556640625 has 39 divisors (see below), whose sum is σ = 93688964767. Its totient is φ = 53125000000.

The previous prime is 70556640613. The next prime is 70556640643. The reversal of 70556640625 is 52604665507.

The square root of 70556640625 is 265625.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 19 ways, for example, as 66906547569 + 3650093056 = 258663^2 + 60416^2 .

It is not a de Polignac number, because 70556640625 - 2⁹ = 70556640113 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 38 ways as a sum of consecutive naturals, for example, 4150390617 + ... + 4150390633.

Almost surely, 2^70556640625 is an apocalyptic number.

70556640625 is the 265625-th square number.

70556640625 is the 132813-rd centered octagonal number.

It is an amenable number.

70556640625 is a deficient number, since it is larger than the sum of its proper divisors (23132324142).

70556640625 is an frugal number, since it uses more digits than its factorization.

70556640625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94 (or 22 counting only the distinct ones).

The product of its (nonzero) digits is 1512000, while the sum is 46.

The spelling of 70556640625 in words is "seventy billion, five hundred fifty-six million, six hundred forty thousand, six hundred twenty-five".