53457605621 has 24 divisors (see below), whose sum is σ = 63175200192. Its totient is φ = 44310110400.

The previous prime is 53457605611. The next prime is 53457605623. The reversal of 53457605621 is 12650675435.

It is a happy number.

It is not a de Polignac number, because 53457605621 - 2⁶ = 53457605557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53457605623) 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 23 ways as a sum of consecutive naturals, for example, 14481386 + ... + 14485076.

It is an arithmetic number, because the mean of its divisors is an integer number (2632300008).

Almost surely, 2^53457605621 is an apocalyptic number.

It is an amenable number.

53457605621 is a deficient number, since it is larger than the sum of its proper divisors (9717594571).

53457605621 is a wasteful number, since it uses less digits than its factorization.

53457605621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5913 (or 5882 counting only the distinct ones).

The product of its (nonzero) digits is 756000, while the sum is 44.

The spelling of 53457605621 in words is "fifty-three billion, four hundred fifty-seven million, six hundred five thousand, six hundred twenty-one".