77220978796 has 48 divisors (see below), whose sum is σ = 150475816960. Its totient is φ = 34433501760.

The previous prime is 77220978767. The next prime is 77220978883. The reversal of 77220978796 is 69787902277.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 939025 + ... + 1017943.

Almost surely, 2^77220978796 is an apocalyptic number.

It is an amenable number.

77220978796 is a deficient number, since it is larger than the sum of its proper divisors (73254838164).

77220978796 is a wasteful number, since it uses less digits than its factorization.

77220978796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79574 (or 79572 counting only the distinct ones).

The product of its (nonzero) digits is 37340352, while the sum is 64.

The spelling of 77220978796 in words is "seventy-seven billion, two hundred twenty million, nine hundred seventy-eight thousand, seven hundred ninety-six".