12531011364 has 81 divisors (see below), whose sum is σ = 32939903451. Its totient is φ = 4170958920.

The previous prime is 12531011341. The next prime is 12531011369. The reversal of 12531011364 is 46311013521.

It is a happy number.

The square root of 12531011364 is 111942.

It is a perfect power (a square), and thus also a powerful number.

12531011364 is a `hidden beast` number, since 12 + 531 + 0 + 113 + 6 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (81).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (12531011369) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 18134259 + ... + 18134949.

Almost surely, 2^12531011364 is an apocalyptic number.

12531011364 is the 111942-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12531011364

12531011364 is an abundant number, since it is smaller than the sum of its proper divisors (20408892087).

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

12531011364 is an frugal number, since it uses more digits than its factorization.

12531011364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1410 (or 696 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

Adding to 12531011364 its reverse (46311013521), we get a palindrome (58842024885).

The spelling of 12531011364 in words is "twelve billion, five hundred thirty-one million, eleven thousand, three hundred sixty-four".