77647384225 has 12 divisors (see below), whose sum is σ = 96975442480. Its totient is φ = 61671013200.

The previous prime is 77647384219. The next prime is 77647384231. The reversal of 77647384225 is 52248374677.

It is an interprime number because it is at equal distance from previous prime (77647384219) and next prime (77647384231).

It is not a de Polignac number, because 77647384225 - 2⁵ = 77647384193 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11168811 + ... + 11175760.

Almost surely, 2^77647384225 is an apocalyptic number.

It is an amenable number.

77647384225 is a deficient number, since it is larger than the sum of its proper divisors (19328058255).

77647384225 is a wasteful number, since it uses less digits than its factorization.

77647384225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22344720 (or 22344715 counting only the distinct ones).

The product of its digits is 15805440, while the sum is 55.

The spelling of 77647384225 in words is "seventy-seven billion, six hundred forty-seven million, three hundred eighty-four thousand, two hundred twenty-five".