25494108231 has 4 divisors (see below), whose sum is σ = 33992144312. Its totient is φ = 16996072152.

The previous prime is 25494108229. The next prime is 25494108239. The reversal of 25494108231 is 13280149452.

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

It is not a de Polignac number, because 25494108231 - 2¹ = 25494108229 is a prime.

It is a super-2 number, since 2×25494108231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25494108231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25494108239) 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, 4249018036 + ... + 4249018041.

It is an arithmetic number, because the mean of its divisors is an integer number (8498036078).

Almost surely, 2^25494108231 is an apocalyptic number.

25494108231 is a deficient number, since it is larger than the sum of its proper divisors (8498036081).

25494108231 is an equidigital number, since it uses as much as digits as its factorization.

25494108231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8498036080.

The product of its (nonzero) digits is 69120, while the sum is 39.

The spelling of 25494108231 in words is "twenty-five billion, four hundred ninety-four million, one hundred eight thousand, two hundred thirty-one".