3656220034545 has 40 divisors (see below), whose sum is σ = 7058275495656. Its totient is φ = 1799985245184.

The previous prime is 3656220034541. The next prime is 3656220034553. The reversal of 3656220034545 is 5454300226563.

3656220034545 is a `hidden beast` number, since 3 + 6 + 5 + 62 + 200 + 345 + 45 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 18537367104 + 3637682667441 = 136152^2 + 1907271^2 .

It is not a de Polignac number, because 3656220034545 - 2² = 3656220034541 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 3656220034545.

It is not an unprimeable number, because it can be changed into a prime (3656220034541) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 347214112 + ... + 347224641.

Almost surely, 2^{3656220034545} is an apocalyptic number.

It is an amenable number.

3656220034545 is a deficient number, since it is larger than the sum of its proper divisors (3402055461111).

3656220034545 is a wasteful number, since it uses less digits than its factorization.

3656220034545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694438783 (or 694438774 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 45.

The spelling of 3656220034545 in words is "three trillion, six hundred fifty-six billion, two hundred twenty million, thirty-four thousand, five hundred forty-five".