12618252719524 has 81 divisors (see below), whose sum is σ = 23623932202689. Its totient is φ = 5896113525120.

The previous prime is 12618252719521. The next prime is 12618252719537. The reversal of 12618252719524 is 42591725281621.

The square root of 12618252719524 is 3552218.

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

It can be written as a sum of positive squares in only one way, i.e., 9823899176100 + 2794353543424 = 3134310^2 + 1671632^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12618252719521) 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, 23068103419 + ... + 23068103965.

Almost surely, 2^{12618252719524} is an apocalyptic number.

12618252719524 is the 3552218-th square number.

It is an amenable number.

12618252719524 is a deficient number, since it is larger than the sum of its proper divisors (11005679483165).

12618252719524 is an frugal number, since it uses more digits than its factorization.

12618252719524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1514 (or 757 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 55.

The spelling of 12618252719524 in words is "twelve trillion, six hundred eighteen billion, two hundred fifty-two million, seven hundred nineteen thousand, five hundred twenty-four".