77111507328 has 64 divisors (see below), whose sum is σ = 207712408320. Its totient is φ = 25341800960.

The previous prime is 77111507309. The next prime is 77111507381. The reversal of 77111507328 is 82370511177.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 77111507328.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1386900 + ... + 1441427.

It is an arithmetic number, because the mean of its divisors is an integer number (3245506380).

Almost surely, 2^77111507328 is an apocalyptic number.

It is an amenable number.

77111507328 is an abundant number, since it is smaller than the sum of its proper divisors (130600900992).

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

77111507328 is a wasteful number, since it uses less digits than its factorization.

77111507328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2828415 (or 2828403 counting only the distinct ones).

The product of its (nonzero) digits is 82320, while the sum is 42.

The spelling of 77111507328 in words is "seventy-seven billion, one hundred eleven million, five hundred seven thousand, three hundred twenty-eight".