45555452521 has 2 divisors, whose sum is σ = 45555452522. Its totient is φ = 45555452520.

The previous prime is 45555452489. The next prime is 45555452533. The reversal of 45555452521 is 12525455554.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43019322921 + 2536129600 = 207411^2 + 50360^2 .

It is a cyclic number.

It is not a de Polignac number, because 45555452521 - 2⁵ = 45555452489 is a prime.

It is not a weakly prime, because it can be changed into another prime (45555452221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22777726260 + 22777726261.

It is an arithmetic number, because the mean of its divisors is an integer number (22777726261).

Almost surely, 2^45555452521 is an apocalyptic number.

It is an amenable number.

45555452521 is a deficient number, since it is larger than the sum of its proper divisors (1).

45555452521 is an equidigital number, since it uses as much as digits as its factorization.

45555452521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1000000, while the sum is 43.

The spelling of 45555452521 in words is "forty-five billion, five hundred fifty-five million, four hundred fifty-two thousand, five hundred twenty-one".