77464521 has 12 divisors (see below), whose sum is σ = 111969520. Its totient is φ = 51607800.

The previous prime is 77464511. The next prime is 77464523. The reversal of 77464521 is 12546477.

77464521 is a `hidden beast` number, since 7 + 7 + 4 + 645 + 2 + 1 = 666.

77464521 is nontrivially palindromic in base 2.

It is not a de Polignac number, because 77464521 - 2⁵ = 77464489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77464523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24150 + ... + 27168.

Almost surely, 2^77464521 is an apocalyptic number.

It is an amenable number.

77464521 is a deficient number, since it is larger than the sum of its proper divisors (34504999).

77464521 is a wasteful number, since it uses less digits than its factorization.

77464521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5876 (or 5873 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 77464521 is about 8801.3931283633. The cubic root of 77464521 is about 426.2858789955.

The spelling of 77464521 in words is "seventy-seven million, four hundred sixty-four thousand, five hundred twenty-one".