45531315621 has 32 divisors (see below), whose sum is σ = 73597852800. Its totient is φ = 27590279040.

The previous prime is 45531315617. The next prime is 45531315647. The reversal of 45531315621 is 12651313554.

45531315621 is a `hidden beast` number, since 4 + 5 + 5 + 3 + 13 + 15 + 621 = 666.

It is not a de Polignac number, because 45531315621 - 2² = 45531315617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45531315421) 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 31 ways as a sum of consecutive naturals, for example, 3616225 + ... + 3628793.

It is an arithmetic number, because the mean of its divisors is an integer number (2299932900).

Almost surely, 2^45531315621 is an apocalyptic number.

It is an amenable number.

45531315621 is a deficient number, since it is larger than the sum of its proper divisors (28066537179).

45531315621 is a wasteful number, since it uses less digits than its factorization.

45531315621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24786 (or 24780 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The spelling of 45531315621 in words is "forty-five billion, five hundred thirty-one million, three hundred fifteen thousand, six hundred twenty-one".