77914568948 has 6 divisors (see below), whose sum is σ = 136350495666. Its totient is φ = 38957284472.

The previous prime is 77914568939. The next prime is 77914568951. The reversal of 77914568948 is 84986541977.

It can be written as a sum of positive squares in only one way, i.e., 76064536804 + 1850032144 = 275798^2 + 43012^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9739321115 + ... + 9739321122.

It is an arithmetic number, because the mean of its divisors is an integer number (22725082611).

Almost surely, 2^77914568948 is an apocalyptic number.

It is an amenable number.

77914568948 is a deficient number, since it is larger than the sum of its proper divisors (58435926718).

77914568948 is a wasteful number, since it uses less digits than its factorization.

77914568948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19478642241 (or 19478642239 counting only the distinct ones).

The product of its digits is 121927680, while the sum is 68.

The spelling of 77914568948 in words is "seventy-seven billion, nine hundred fourteen million, five hundred sixty-eight thousand, nine hundred forty-eight".