53668197021 has 4 divisors (see below), whose sum is σ = 71557596032. Its totient is φ = 35778798012.

The previous prime is 53668196977. The next prime is 53668197041. The reversal of 53668197021 is 12079186635.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 53668197021 - 2⁹ = 53668196509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53668197041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8944699501 + ... + 8944699506.

It is an arithmetic number, because the mean of its divisors is an integer number (17889399008).

Almost surely, 2^53668197021 is an apocalyptic number.

It is an amenable number.

53668197021 is a deficient number, since it is larger than the sum of its proper divisors (17889399011).

53668197021 is a wasteful number, since it uses less digits than its factorization.

53668197021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17889399010.

The product of its (nonzero) digits is 544320, while the sum is 48.

The spelling of 53668197021 in words is "fifty-three billion, six hundred sixty-eight million, one hundred ninety-seven thousand, twenty-one".