77649692 has 6 divisors (see below), whose sum is σ = 135886968. Its totient is φ = 38824844.

The previous prime is 77649683. The next prime is 77649703. The reversal of 77649692 is 29694677.

It is a self number, because there is not a number n which added to its sum of digits gives 77649692.

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, 9706208 + ... + 9706215.

It is an arithmetic number, because the mean of its divisors is an integer number (22647828).

Almost surely, 2^77649692 is an apocalyptic number.

It is an amenable number.

77649692 is a deficient number, since it is larger than the sum of its proper divisors (58237276).

77649692 is a wasteful number, since it uses less digits than its factorization.

77649692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19412427 (or 19412425 counting only the distinct ones).

The product of its digits is 1143072, while the sum is 50.

The square root of 77649692 is about 8811.9062636866. The cubic root of 77649692 is about 426.6252729482.

The spelling of 77649692 in words is "seventy-seven million, six hundred forty-nine thousand, six hundred ninety-two".