3656387872231 has 16 divisors (see below), whose sum is σ = 3898045518048. Its totient is φ = 3417713740800.

The previous prime is 3656387872153. The next prime is 3656387872253. The reversal of 3656387872231 is 1322787836563.

It is a cyclic number.

It is not a de Polignac number, because 3656387872231 - 2³¹ = 3654240388583 is a prime.

It is a super-2 number, since 2×3656387872231² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3656387872231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3656387876231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3349011 + ... + 4304491.

It is an arithmetic number, because the mean of its divisors is an integer number (243627844878).

Almost surely, 2^{3656387872231} is an apocalyptic number.

3656387872231 is a deficient number, since it is larger than the sum of its proper divisors (241657645817).

3656387872231 is a wasteful number, since it uses less digits than its factorization.

3656387872231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 957042.

The product of its digits is 60963840, while the sum is 61.

The spelling of 3656387872231 in words is "three trillion, six hundred fifty-six billion, three hundred eighty-seven million, eight hundred seventy-two thousand, two hundred thirty-one".