45501550021 has 2 divisors, whose sum is σ = 45501550022. Its totient is φ = 45501550020.

The previous prime is 45501549991. The next prime is 45501550027. The reversal of 45501550021 is 12005510554.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29074001121 + 16427548900 = 170511^2 + 128170^2 .

It is a cyclic number.

It is not a de Polignac number, because 45501550021 - 2¹⁵ = 45501517253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45501550027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22750775010 + 22750775011.

It is an arithmetic number, because the mean of its divisors is an integer number (22750775011).

Almost surely, 2^45501550021 is an apocalyptic number.

It is an amenable number.

45501550021 is a deficient number, since it is larger than the sum of its proper divisors (1).

45501550021 is an equidigital number, since it uses as much as digits as its factorization.

45501550021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5000, while the sum is 28.

The spelling of 45501550021 in words is "forty-five billion, five hundred one million, five hundred fifty thousand, twenty-one".