45118518521 has 2 divisors, whose sum is σ = 45118518522. Its totient is φ = 45118518520.

The previous prime is 45118518509. The next prime is 45118518581. The reversal of 45118518521 is 12581581154.

45118518521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42658358521 + 2460160000 = 206539^2 + 49600^2 .

It is a cyclic number.

It is not a de Polignac number, because 45118518521 - 2³⁰ = 44044776697 is a prime.

It is not a weakly prime, because it can be changed into another prime (45118518581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22559259260 + 22559259261.

It is an arithmetic number, because the mean of its divisors is an integer number (22559259261).

Almost surely, 2^45118518521 is an apocalyptic number.

It is an amenable number.

45118518521 is a deficient number, since it is larger than the sum of its proper divisors (1).

45118518521 is an equidigital number, since it uses as much as digits as its factorization.

45118518521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64000, while the sum is 41.

The spelling of 45118518521 in words is "forty-five billion, one hundred eighteen million, five hundred eighteen thousand, five hundred twenty-one".