77913544980 has 48 divisors (see below), whose sum is σ = 218306479104. Its totient is φ = 20762797440.

The previous prime is 77913544963. The next prime is 77913545029. The reversal of 77913544980 is 8944531977.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 77913544980.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 353127 + ... + 529646.

It is an arithmetic number, because the mean of its divisors is an integer number (4548051648).

Almost surely, 2^77913544980 is an apocalyptic number.

It is an amenable number.

77913544980 is an abundant number, since it is smaller than the sum of its proper divisors (140392934124).

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

77913544980 is a wasteful number, since it uses less digits than its factorization.

77913544980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884256 (or 884254 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 57.

The spelling of 77913544980 in words is "seventy-seven billion, nine hundred thirteen million, five hundred forty-four thousand, nine hundred eighty".