523151621564 has 48 divisors (see below), whose sum is σ = 1075672241280. Its totient is φ = 219483407040.

The previous prime is 523151621561. The next prime is 523151621593. The reversal of 523151621564 is 465126151325.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523151621561) 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, 7011647 + ... + 7085865.

It is an arithmetic number, because the mean of its divisors is an integer number (22409838360).

Almost surely, 2^523151621564 is an apocalyptic number.

It is an amenable number.

523151621564 is an abundant number, since it is smaller than the sum of its proper divisors (552520619716).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

523151621564 is a wasteful number, since it uses less digits than its factorization.

523151621564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86570 (or 86568 counting only the distinct ones).

The product of its digits is 216000, while the sum is 41.

Adding to 523151621564 its reverse (465126151325), we get a palindrome (988277772889).

The spelling of 523151621564 in words is "five hundred twenty-three billion, one hundred fifty-one million, six hundred twenty-one thousand, five hundred sixty-four".