523456163021 has 4 divisors (see below), whose sum is σ = 571043086944. Its totient is φ = 475869239100.

The previous prime is 523456163003. The next prime is 523456163081. The reversal of 523456163021 is 120361654325.

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 a cyclic number.

It is not a de Polignac number, because 523456163021 - 2³⁸ = 248578256077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523456163081) 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, 23793461945 + ... + 23793461966.

It is an arithmetic number, because the mean of its divisors is an integer number (142760771736).

Almost surely, 2^523456163021 is an apocalyptic number.

It is an amenable number.

523456163021 is a deficient number, since it is larger than the sum of its proper divisors (47586923923).

523456163021 is a wasteful number, since it uses less digits than its factorization.

523456163021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47586923922.

The product of its (nonzero) digits is 129600, while the sum is 38.

The spelling of 523456163021 in words is "five hundred twenty-three billion, four hundred fifty-six million, one hundred sixty-three thousand, twenty-one".