3661362126565 has 16 divisors (see below), whose sum is σ = 5161752481536. Its totient is φ = 2457977371200.

The previous prime is 3661362126551. The next prime is 3661362126581. The reversal of 3661362126565 is 5656212631663.

It is not a de Polignac number, because 3661362126565 - 2⁷ = 3661362126437 is a prime.

It is a Duffinian number.

It is a congruent 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, 2560392381 + ... + 2560393810.

It is an arithmetic number, because the mean of its divisors is an integer number (322609530096).

Almost surely, 2^{3661362126565} is an apocalyptic number.

It is an amenable number.

3661362126565 is a deficient number, since it is larger than the sum of its proper divisors (1500390354971).

3661362126565 is a wasteful number, since it uses less digits than its factorization.

3661362126565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5120786220.

The product of its digits is 6998400, while the sum is 52.

The spelling of 3661362126565 in words is "three trillion, six hundred sixty-one billion, three hundred sixty-two million, one hundred twenty-six thousand, five hundred sixty-five".