77948764 has 6 divisors (see below), whose sum is σ = 136410344. Its totient is φ = 38974380.

The previous prime is 77948737. The next prime is 77948777. The reversal of 77948764 is 46784977.

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, 9743592 + ... + 9743599.

Almost surely, 2^77948764 is an apocalyptic number.

It is an amenable number.

77948764 is a deficient number, since it is larger than the sum of its proper divisors (58461580).

77948764 is a wasteful number, since it uses less digits than its factorization.

77948764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19487195 (or 19487193 counting only the distinct ones).

The product of its digits is 2370816, while the sum is 52.

The square root of 77948764 is about 8828.8597225236. The cubic root of 77948764 is about 427.1722947123.

The spelling of 77948764 in words is "seventy-seven million, nine hundred forty-eight thousand, seven hundred sixty-four".