3640440521055 has 32 divisors (see below), whose sum is σ = 6334865611200. Its totient is φ = 1774472140800.

The previous prime is 3640440521021. The next prime is 3640440521059. The reversal of 3640440521055 is 5501250440463.

It is not a de Polignac number, because 3640440521055 - 2²⁰ = 3640439472479 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3640440521059) 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, 92400730 + ... + 92440119.

It is an arithmetic number, because the mean of its divisors is an integer number (197964550350).

Almost surely, 2^{3640440521055} is an apocalyptic number.

3640440521055 is a deficient number, since it is larger than the sum of its proper divisors (2694425090145).

3640440521055 is a wasteful number, since it uses less digits than its factorization.

3640440521055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184840971.

The product of its (nonzero) digits is 288000, while the sum is 39.

The spelling of 3640440521055 in words is "three trillion, six hundred forty billion, four hundred forty million, five hundred twenty-one thousand, fifty-five".