77707806747 has 16 divisors (see below), whose sum is σ = 107193527040. Its totient is φ = 50013990432.

The previous prime is 77707806713. The next prime is 77707806751. The reversal of 77707806747 is 74760870777.

It is not a de Polignac number, because 77707806747 - 2⁷ = 77707806619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77707806707) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1010658 + ... + 1084824.

It is an arithmetic number, because the mean of its divisors is an integer number (6699595440).

Almost surely, 2^77707806747 is an apocalyptic number.

77707806747 is a deficient number, since it is larger than the sum of its proper divisors (29485720293).

77707806747 is a wasteful number, since it uses less digits than its factorization.

77707806747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86242.

The product of its (nonzero) digits is 22588608, while the sum is 60.

The spelling of 77707806747 in words is "seventy-seven billion, seven hundred seven million, eight hundred six thousand, seven hundred forty-seven".