53643261245721 has 16 divisors (see below), whose sum is σ = 81742879196544. Its totient is φ = 30653004582144.

The previous prime is 53643261245699. The next prime is 53643261245723. The reversal of 53643261245721 is 12754216234635.

It is not a de Polignac number, because 53643261245721 - 2¹⁷ = 53643261114649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53643261245723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9679440 + ... + 14176673.

It is an arithmetic number, because the mean of its divisors is an integer number (5108929949784).

Almost surely, 2^{53643261245721} is an apocalyptic number.

It is an amenable number.

53643261245721 is a deficient number, since it is larger than the sum of its proper divisors (28099617950823).

53643261245721 is a wasteful number, since it uses less digits than its factorization.

53643261245721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23963200.

The product of its digits is 7257600, while the sum is 51.

The spelling of 53643261245721 in words is "fifty-three trillion, six hundred forty-three billion, two hundred sixty-one million, two hundred forty-five thousand, seven hundred twenty-one".