77677581980 has 24 divisors (see below), whose sum is σ = 164955767760. Its totient is φ = 30721919360.

The previous prime is 77677581977. The next prime is 77677581997. The reversal of 77677581980 is 8918577677.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 21817766 + ... + 21821325.

It is an arithmetic number, because the mean of its divisors is an integer number (6873156990).

Almost surely, 2^77677581980 is an apocalyptic number.

It is an amenable number.

77677581980 is an abundant number, since it is smaller than the sum of its proper divisors (87278185780).

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

77677581980 is a wasteful number, since it uses less digits than its factorization.

77677581980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43639189 (or 43639187 counting only the distinct ones).

The product of its (nonzero) digits is 41489280, while the sum is 65.

The spelling of 77677581980 in words is "seventy-seven billion, six hundred seventy-seven million, five hundred eighty-one thousand, nine hundred eighty".