77604645 has 32 divisors (see below), whose sum is σ = 136396800. Its totient is φ = 37502784.

The previous prime is 77604641. The next prime is 77604679. The reversal of 77604645 is 54640677.

It is not a de Polignac number, because 77604645 - 2² = 77604641 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77604641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 636 + ... + 12474.

It is an arithmetic number, because the mean of its divisors is an integer number (4262400).

Almost surely, 2^77604645 is an apocalyptic number.

It is an amenable number.

77604645 is a deficient number, since it is larger than the sum of its proper divisors (58792155).

77604645 is a wasteful number, since it uses less digits than its factorization.

77604645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11889.

The product of its (nonzero) digits is 141120, while the sum is 39.

The square root of 77604645 is about 8809.3498625040. The cubic root of 77604645 is about 426.5427574622.

The spelling of 77604645 in words is "seventy-seven million, six hundred four thousand, six hundred forty-five".