25126442659 has 4 divisors (see below), whose sum is σ = 25127325216. Its totient is φ = 25125560104.

The previous prime is 25126442657. The next prime is 25126442699. The reversal of 25126442659 is 95624462152.

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

It is a cyclic number.

It is not a de Polignac number, because 25126442659 - 2¹ = 25126442657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25126442657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 397099 + ... + 456004.

It is an arithmetic number, because the mean of its divisors is an integer number (6281831304).

Almost surely, 2^25126442659 is an apocalyptic number.

25126442659 is a deficient number, since it is larger than the sum of its proper divisors (882557).

25126442659 is an equidigital number, since it uses as much as digits as its factorization.

25126442659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 882556.

The product of its digits is 1036800, while the sum is 46.

The spelling of 25126442659 in words is "twenty-five billion, one hundred twenty-six million, four hundred forty-two thousand, six hundred fifty-nine".