77577660408 has 32 divisors (see below), whose sum is σ = 193954579200. Its totient is φ = 25857829728.

The previous prime is 77577660403. The next prime is 77577660427. The reversal of 77577660408 is 80406677577.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77577660403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 431985 + ... + 584607.

It is an arithmetic number, because the mean of its divisors is an integer number (6061080600).

Almost surely, 2^77577660408 is an apocalyptic number.

It is an amenable number.

77577660408 is an abundant number, since it is smaller than the sum of its proper divisors (116376918792).

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

77577660408 is a wasteful number, since it uses less digits than its factorization.

77577660408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173811 (or 173807 counting only the distinct ones).

The product of its (nonzero) digits is 13829760, while the sum is 57.

The spelling of 77577660408 in words is "seventy-seven billion, five hundred seventy-seven million, six hundred sixty thousand, four hundred eight".