45145665641 has 4 divisors (see below), whose sum is σ = 45173245572. Its totient is φ = 45118085712.

The previous prime is 45145665637. The next prime is 45145665709. The reversal of 45145665641 is 14656654154.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14656654154 = 2 ⋅7328327077.

It can be written as a sum of positive squares in 2 ways, for example, as 17376776041 + 27768889600 = 131821^2 + 166640^2 .

It is a cyclic number.

It is not a de Polignac number, because 45145665641 - 2² = 45145665637 is a prime.

It is a super-2 number, since 2×45145665641² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45145605641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13787510 + ... + 13790783.

It is an arithmetic number, because the mean of its divisors is an integer number (11293311393).

Almost surely, 2^45145665641 is an apocalyptic number.

It is an amenable number.

45145665641 is a deficient number, since it is larger than the sum of its proper divisors (27579931).

45145665641 is a wasteful number, since it uses less digits than its factorization.

45145665641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27579930.

The product of its digits is 1728000, while the sum is 47.

The spelling of 45145665641 in words is "forty-five billion, one hundred forty-five million, six hundred sixty-five thousand, six hundred forty-one".