77912265730 has 16 divisors (see below), whose sum is σ = 151029930744. Its totient is φ = 28767605760.

The previous prime is 77912265721. The next prime is 77912265787. The reversal of 77912265730 is 3756221977.

It can be written as a sum of positive squares in 4 ways, for example, as 29858803209 + 48053462521 = 172797^2 + 219211^2 .

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, 299662431 + ... + 299662690.

Almost surely, 2^77912265730 is an apocalyptic number.

77912265730 is a deficient number, since it is larger than the sum of its proper divisors (73117665014).

77912265730 is a wasteful number, since it uses less digits than its factorization.

77912265730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599325141.

The product of its (nonzero) digits is 1111320, while the sum is 49.

The spelling of 77912265730 in words is "seventy-seven billion, nine hundred twelve million, two hundred sixty-five thousand, seven hundred thirty".