45544212521 has 4 divisors (see below), whose sum is σ = 45544667844. Its totient is φ = 45543757200.

The previous prime is 45544212517. The next prime is 45544212547. The reversal of 45544212521 is 12521244554.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 28912241296 + 16631971225 = 170036^2 + 128965^2 .

It is a cyclic number.

It is not a de Polignac number, because 45544212521 - 2² = 45544212517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45544212821) 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, 5090 + ... + 301851.

It is an arithmetic number, because the mean of its divisors is an integer number (11386166961).

Almost surely, 2^45544212521 is an apocalyptic number.

It is an amenable number.

45544212521 is a deficient number, since it is larger than the sum of its proper divisors (455323).

45544212521 is a wasteful number, since it uses less digits than its factorization.

45544212521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455322.

The product of its digits is 64000, while the sum is 35.

The spelling of 45544212521 in words is "forty-five billion, five hundred forty-four million, two hundred twelve thousand, five hundred twenty-one".