76138565 has 4 divisors (see below), whose sum is σ = 91366284. Its totient is φ = 60910848.

The previous prime is 76138561. The next prime is 76138577. The reversal of 76138565 is 56583167.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 48080356 + 28058209 = 6934^2 + 5297^2 .

It is a cyclic number.

It is not a de Polignac number, because 76138565 - 2² = 76138561 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76138561) 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, 7613852 + ... + 7613861.

It is an arithmetic number, because the mean of its divisors is an integer number (22841571).

Almost surely, 2^76138565 is an apocalyptic number.

It is an amenable number.

76138565 is a deficient number, since it is larger than the sum of its proper divisors (15227719).

76138565 is a wasteful number, since it uses less digits than its factorization.

76138565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15227718.

The product of its digits is 151200, while the sum is 41.

The square root of 76138565 is about 8725.7415157682. The cubic root of 76138565 is about 423.8396305966.

The spelling of 76138565 in words is "seventy-six million, one hundred thirty-eight thousand, five hundred sixty-five".