3665315306565 has 48 divisors (see below), whose sum is σ = 7169770408320. Its totient is φ = 1715842477440.

The previous prime is 3665315306551. The next prime is 3665315306579. The reversal of 3665315306565 is 5656035135663.

3665315306565 is a `hidden beast` number, since 3 + 6 + 6 + 53 + 1 + 530 + 6 + 56 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (3665315306551) and next prime (3665315306579).

It is not a de Polignac number, because 3665315306565 - 2⁵ = 3665315306533 is a prime.

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, 127652497 + ... + 127681206.

It is an arithmetic number, because the mean of its divisors is an integer number (149370216840).

Almost surely, 2^{3665315306565} is an apocalyptic number.

It is an amenable number.

3665315306565 is a deficient number, since it is larger than the sum of its proper divisors (3504455101755).

3665315306565 is a wasteful number, since it uses less digits than its factorization.

3665315306565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255333754 (or 255333751 counting only the distinct ones).

The product of its (nonzero) digits is 21870000, while the sum is 54.

The spelling of 3665315306565 in words is "three trillion, six hundred sixty-five billion, three hundred fifteen million, three hundred six thousand, five hundred sixty-five".