7423112762521 has 27 divisors (see below), whose sum is σ = 7949484568701. Its totient is φ = 6930180993024.

The previous prime is 7423112762503. The next prime is 7423112762537. The reversal of 7423112762521 is 1252672113247.

It is a happy number.

The square root of 7423112762521 is 2724539.

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

It can be written as a sum of positive squares in 4 ways, for example, as 2402465900121 + 5020646862400 = 1549989^2 + 2240680^2 .

It is not a de Polignac number, because 7423112762521 - 2²⁵ = 7423079208089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7423112762591) 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, 6438085081 + ... + 6438086233.

Almost surely, 2^{7423112762521} is an apocalyptic number.

7423112762521 is the 2724539-th square number.

7423112762521 is the 1362270-th centered octagonal number.

It is an amenable number.

7423112762521 is a deficient number, since it is larger than the sum of its proper divisors (526371806180).

7423112762521 is an frugal number, since it uses more digits than its factorization.

7423112762521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2618 (or 1309 counting only the distinct ones).

The product of its digits is 282240, while the sum is 43.

Adding to 7423112762521 its reverse (1252672113247), we get a palindrome (8675784875768).

The spelling of 7423112762521 in words is "seven trillion, four hundred twenty-three billion, one hundred twelve million, seven hundred sixty-two thousand, five hundred twenty-one".