45145655621 has 16 divisors (see below), whose sum is σ = 49665493440. Its totient is φ = 40695780480.

The previous prime is 45145655587. The next prime is 45145655657. The reversal of 45145655621 is 12655654154.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45145655621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45145655221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1350335 + ... + 1383363.

It is an arithmetic number, because the mean of its divisors is an integer number (3104093340).

Almost surely, 2^45145655621 is an apocalyptic number.

It is an amenable number.

45145655621 is a deficient number, since it is larger than the sum of its proper divisors (4519837819).

45145655621 is a wasteful number, since it uses less digits than its factorization.

45145655621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34084.

The product of its digits is 720000, while the sum is 44.

The spelling of 45145655621 in words is "forty-five billion, one hundred forty-five million, six hundred fifty-five thousand, six hundred twenty-one".