45454541521 has 2 divisors, whose sum is σ = 45454541522. Its totient is φ = 45454541520.

The previous prime is 45454541501. The next prime is 45454541549. The reversal of 45454541521 is 12514545454.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32865701521 + 12588840000 = 181289^2 + 112200^2 .

It is a cyclic number.

It is not a de Polignac number, because 45454541521 - 2⁷ = 45454541393 is a prime.

It is a super-2 number, since 2×45454541521² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (45454541501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22727270760 + 22727270761.

It is an arithmetic number, because the mean of its divisors is an integer number (22727270761).

Almost surely, 2^45454541521 is an apocalyptic number.

It is an amenable number.

45454541521 is a deficient number, since it is larger than the sum of its proper divisors (1).

45454541521 is an equidigital number, since it uses as much as digits as its factorization.

45454541521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 320000, while the sum is 40.

The spelling of 45454541521 in words is "forty-five billion, four hundred fifty-four million, five hundred forty-one thousand, five hundred twenty-one".