2523457321561 has 8 divisors (see below), whose sum is σ = 2847788827200. Its totient is φ = 2214946865040.

The previous prime is 2523457321519. The next prime is 2523457321589. The reversal of 2523457321561 is 1651237543252.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2523457321561 - 2¹⁷ = 2523457190489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2523457321061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3955261941 + ... + 3955262578.

It is an arithmetic number, because the mean of its divisors is an integer number (355973603400).

Almost surely, 2^{2523457321561} is an apocalyptic number.

It is an amenable number.

2523457321561 is a deficient number, since it is larger than the sum of its proper divisors (324331505639).

2523457321561 is a wasteful number, since it uses less digits than its factorization.

2523457321561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7910524559.

The product of its digits is 1512000, while the sum is 46.

The spelling of 2523457321561 in words is "two trillion, five hundred twenty-three billion, four hundred fifty-seven million, three hundred twenty-one thousand, five hundred sixty-one".