45440520021 has 64 divisors (see below), whose sum is σ = 73631255040. Its totient is φ = 27527662080.

The previous prime is 45440520019. The next prime is 45440520043. The reversal of 45440520021 is 12002504454.

45440520021 is a `hidden beast` number, since 4 + 54 + 405 + 200 + 2 + 1 = 666.

It is not a de Polignac number, because 45440520021 - 2¹ = 45440520019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45440520001) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16576711 + ... + 16579451.

It is an arithmetic number, because the mean of its divisors is an integer number (1150488360).

Almost surely, 2^45440520021 is an apocalyptic number.

It is an amenable number.

45440520021 is a deficient number, since it is larger than the sum of its proper divisors (28190735019).

45440520021 is a wasteful number, since it uses less digits than its factorization.

45440520021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3483 (or 3477 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The spelling of 45440520021 in words is "forty-five billion, four hundred forty million, five hundred twenty thousand, twenty-one".