77190978052 has 48 divisors (see below), whose sum is σ = 138567985920. Its totient is φ = 37615968000.

The previous prime is 77190978047. The next prime is 77190978071. The reversal of 77190978052 is 25087909177.

It is a junction number, because it is equal to n+sod(n) for n = 77190977984 and 77190978002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7830927 + ... + 7840777.

It is an arithmetic number, because the mean of its divisors is an integer number (2886833040).

Almost surely, 2^77190978052 is an apocalyptic number.

It is an amenable number.

77190978052 is a deficient number, since it is larger than the sum of its proper divisors (61377007868).

77190978052 is a wasteful number, since it uses less digits than its factorization.

77190978052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10252 (or 10250 counting only the distinct ones).

The product of its (nonzero) digits is 2222640, while the sum is 55.

The spelling of 77190978052 in words is "seventy-seven billion, one hundred ninety million, nine hundred seventy-eight thousand, fifty-two".