25590427501 has 4 divisors (see below), whose sum is σ = 25640703900. Its totient is φ = 25540151104.

The previous prime is 25590427451. The next prime is 25590427523. The reversal of 25590427501 is 10572409552.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16598457225 + 8991970276 = 128835^2 + 94826^2 .

It is a cyclic number.

It is not a de Polignac number, because 25590427501 - 2²³ = 25582038893 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 (25590427561) 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, 25137436 + ... + 25138453.

It is an arithmetic number, because the mean of its divisors is an integer number (6410175975).

Almost surely, 2^25590427501 is an apocalyptic number.

It is an amenable number.

25590427501 is a deficient number, since it is larger than the sum of its proper divisors (50276399).

25590427501 is an equidigital number, since it uses as much as digits as its factorization.

25590427501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50276398.

The product of its (nonzero) digits is 126000, while the sum is 40.

The spelling of 25590427501 in words is "twenty-five billion, five hundred ninety million, four hundred twenty-seven thousand, five hundred one".