77381465 has 16 divisors (see below), whose sum is σ = 106479360. Its totient is φ = 52883520.

The previous prime is 77381443. The next prime is 77381477. The reversal of 77381465 is 56418377.

It is not a de Polignac number, because 77381465 - 2²⁴ = 60604249 is a prime.

It is a super-2 number, since 2×77381465² = 11975782251092450, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7331 + ... + 14439.

It is an arithmetic number, because the mean of its divisors is an integer number (6654960).

Almost surely, 2^77381465 is an apocalyptic number.

It is an amenable number.

77381465 is a deficient number, since it is larger than the sum of its proper divisors (29097895).

77381465 is a wasteful number, since it uses less digits than its factorization.

77381465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7432.

The product of its digits is 141120, while the sum is 41.

The square root of 77381465 is about 8796.6735190071. The cubic root of 77381465 is about 426.1334726174.

The spelling of 77381465 in words is "seventy-seven million, three hundred eighty-one thousand, four hundred sixty-five".