77564145 has 16 divisors (see below), whose sum is σ = 124756992. Its totient is φ = 41149440.

The previous prime is 77564141. The next prime is 77564153. The reversal of 77564145 is 54146577.

It is not a de Polignac number, because 77564145 - 2² = 77564141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77564141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10672 + ... + 16401.

It is an arithmetic number, because the mean of its divisors is an integer number (7797312).

Almost surely, 2^77564145 is an apocalyptic number.

It is an amenable number.

77564145 is a deficient number, since it is larger than the sum of its proper divisors (47192847).

77564145 is a wasteful number, since it uses less digits than its factorization.

77564145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27272.

The product of its digits is 117600, while the sum is 39.

The square root of 77564145 is about 8807.0508684803. The cubic root of 77564145 is about 426.4685437444.

The spelling of 77564145 in words is "seventy-seven million, five hundred sixty-four thousand, one hundred forty-five".