3655513665 has 32 divisors (see below), whose sum is σ = 6532761600. Its totient is φ = 1939386240.

The previous prime is 3655513663. The next prime is 3655513691. The reversal of 3655513665 is 5663155563.

3655513665 is a `hidden beast` number, since 3 + 6 + 5 + 551 + 36 + 65 = 666.

3655513665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3655513665 - 2¹ = 3655513663 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 3655513665.

It is not an unprimeable number, because it can be changed into a prime (3655513663) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45100 + ... + 96669.

It is an arithmetic number, because the mean of its divisors is an integer number (204148800).

Almost surely, 2^3655513665 is an apocalyptic number.

It is an amenable number.

3655513665 is a deficient number, since it is larger than the sum of its proper divisors (2877247935).

3655513665 is a wasteful number, since it uses less digits than its factorization.

3655513665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141974 (or 141968 counting only the distinct ones).

The product of its digits is 1215000, while the sum is 45.

The square root of 3655513665 is about 60460.8440645679. The cubic root of 3655513665 is about 1540.4566118037.

The spelling of 3655513665 in words is "three billion, six hundred fifty-five million, five hundred thirteen thousand, six hundred sixty-five".