77618064 has 20 divisors (see below), whose sum is σ = 200513456. Its totient is φ = 25872672.

The previous prime is 77618041. The next prime is 77618069. The reversal of 77618064 is 46081677.

It is not an unprimeable number, because it can be changed into a prime (77618069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 808474 + ... + 808569.

Almost surely, 2^77618064 is an apocalyptic number.

It is an amenable number.

77618064 is an abundant number, since it is smaller than the sum of its proper divisors (122895392).

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

77618064 is a wasteful number, since it uses less digits than its factorization.

77618064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1617054 (or 1617048 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 77618064 is about 8810.1114635401. Note that the first 3 decimals coincide. The cubic root of 77618064 is about 426.5673412458.

The spelling of 77618064 in words is "seventy-seven million, six hundred eighteen thousand, sixty-four".