77067780408 has 48 divisors (see below), whose sum is σ = 214366468680. Its totient is φ = 24994954944.

The previous prime is 77067780359. The next prime is 77067780421. The reversal of 77067780408 is 80408776077.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14462010 + ... + 14467337.

Almost surely, 2^77067780408 is an apocalyptic number.

It is an amenable number.

77067780408 is an abundant number, since it is smaller than the sum of its proper divisors (137298688272).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77067780408 is a wasteful number, since it uses less digits than its factorization.

77067780408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28929396 (or 28929389 counting only the distinct ones).

The product of its (nonzero) digits is 3687936, while the sum is 54.

The spelling of 77067780408 in words is "seventy-seven billion, sixty-seven million, seven hundred eighty thousand, four hundred eight".