77313565 has 48 divisors (see below), whose sum is σ = 116311680. Its totient is φ = 48263040.

The previous prime is 77313547. The next prime is 77313589. The reversal of 77313565 is 56531377.

77313565 = 365² + 366² + ... + 654².

It is a happy number.

It is not a de Polignac number, because 77313565 - 2⁷ = 77313437 is a prime.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 366310 + ... + 366520.

It is an arithmetic number, because the mean of its divisors is an integer number (2423160).

Almost surely, 2^77313565 is an apocalyptic number.

It is an amenable number.

77313565 is a deficient number, since it is larger than the sum of its proper divisors (38998115).

77313565 is a wasteful number, since it uses less digits than its factorization.

77313565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290 (or 271 counting only the distinct ones).

The product of its digits is 66150, while the sum is 37.

The square root of 77313565 is about 8792.8132585652. The cubic root of 77313565 is about 426.0087962065.

The spelling of 77313565 in words is "seventy-seven million, three hundred thirteen thousand, five hundred sixty-five".