523025664 has 144 divisors (see below), whose sum is σ = 1601187840. Its totient is φ = 148469760.

The previous prime is 523025663. The next prime is 523025669. The reversal of 523025664 is 466520325.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523025663) 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, 1456717 + ... + 1457075.

It is an arithmetic number, because the mean of its divisors is an integer number (11119360).

Almost surely, 2^523025664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 523025664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (800593920).

523025664 is an abundant number, since it is smaller than the sum of its proper divisors (1078162176).

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

523025664 is a wasteful number, since it uses less digits than its factorization.

523025664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656 (or 642 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 33.

The square root of 523025664 is about 22869.7543493585. The cubic root of 523025664 is about 805.7017986525.

Adding to 523025664 its reverse (466520325), we get a palindrome (989545989).

The spelling of 523025664 in words is "five hundred twenty-three million, twenty-five thousand, six hundred sixty-four".