653243231312 has 80 divisors (see below), whose sum is σ = 1470884131200. Its totient is φ = 275274754560.

The previous prime is 653243231273. The next prime is 653243231323. The reversal of 653243231312 is 213132342356.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1395014 + ... + 1803482.

It is an arithmetic number, because the mean of its divisors is an integer number (18386051640).

Almost surely, 2^653243231312 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 653243231312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (735442065600).

653243231312 is an abundant number, since it is smaller than the sum of its proper divisors (817640899888).

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

653243231312 is a wasteful number, since it uses less digits than its factorization.

653243231312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408724 (or 408718 counting only the distinct ones).

The product of its digits is 77760, while the sum is 35.

Adding to 653243231312 its reverse (213132342356), we get a palindrome (866375573668).

The spelling of 653243231312 in words is "six hundred fifty-three billion, two hundred forty-three million, two hundred thirty-one thousand, three hundred twelve".