45066619521 has 81 divisors (see below), whose sum is σ = 83324688993. Its totient is φ = 23385756240.

The previous prime is 45066619513. The next prime is 45066619537. The reversal of 45066619521 is 12591666054.

The square root of 45066619521 is 212289.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 45066619521 - 2³ = 45066619513 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (45066619561) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 49038300 + ... + 49039218.

Almost surely, 2^45066619521 is an apocalyptic number.

45066619521 is the 212289-th square number.

45066619521 is the 106145-th centered octagonal number.

It is an amenable number.

45066619521 is a deficient number, since it is larger than the sum of its proper divisors (38258069472).

45066619521 is an equidigital number, since it uses as much as digits as its factorization.

45066619521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1880 (or 940 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The spelling of 45066619521 in words is "forty-five billion, sixty-six million, six hundred nineteen thousand, five hundred twenty-one".