61565670625 has 20 divisors (see below), whose sum is σ = 79414179328. Its totient is φ = 47663730000.

The previous prime is 61565670619. The next prime is 61565670659. The reversal of 61565670625 is 52607656516.

61565670625 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61565670625 - 2¹⁵ = 61565637857 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1569417 + ... + 1608166.

Almost surely, 2^61565670625 is an apocalyptic number.

It is an amenable number.

61565670625 is a deficient number, since it is larger than the sum of its proper divisors (17848508703).

61565670625 is an equidigital number, since it uses as much as digits as its factorization.

61565670625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3177634 (or 3177619 counting only the distinct ones).

The product of its (nonzero) digits is 2268000, while the sum is 49.

The spelling of 61565670625 in words is "sixty-one billion, five hundred sixty-five million, six hundred seventy thousand, six hundred twenty-five".