25540360501 has 4 divisors (see below), whose sum is σ = 25540700652. Its totient is φ = 25540020352.

The previous prime is 25540360463. The next prime is 25540360513. The reversal of 25540360501 is 10506304552.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 20779222500 + 4761138001 = 144150^2 + 69001^2 .

It is a cyclic number.

It is not a de Polignac number, because 25540360501 - 2¹¹ = 25540358453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25540360541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2236 + ... + 226021.

It is an arithmetic number, because the mean of its divisors is an integer number (6385175163).

Almost surely, 2^25540360501 is an apocalyptic number.

It is an amenable number.

25540360501 is a deficient number, since it is larger than the sum of its proper divisors (340151).

25540360501 is a wasteful number, since it uses less digits than its factorization.

25540360501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340150.

The product of its (nonzero) digits is 18000, while the sum is 31.

The spelling of 25540360501 in words is "twenty-five billion, five hundred forty million, three hundred sixty thousand, five hundred one".