45544551021 has 16 divisors (see below), whose sum is σ = 68128494720. Its totient is φ = 30068245440.

The previous prime is 45544551001. The next prime is 45544551043. The reversal of 45544551021 is 12015544554.

45544551021 is a `hidden beast` number, since 4 + 5 + 544 + 5 + 5 + 102 + 1 = 666.

It is not a de Polignac number, because 45544551021 - 2⁹ = 45544550509 is a prime.

It is a super-2 number, since 2×45544551021² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45544551001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8185740 + ... + 8191301.

It is an arithmetic number, because the mean of its divisors is an integer number (4258030920).

Almost surely, 2^45544551021 is an apocalyptic number.

It is an amenable number.

45544551021 is a deficient number, since it is larger than the sum of its proper divisors (22583943699).

45544551021 is a wasteful number, since it uses less digits than its factorization.

45544551021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16377153 (or 16377147 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 36.

The spelling of 45544551021 in words is "forty-five billion, five hundred forty-four million, five hundred fifty-one thousand, twenty-one".