25171094442 has 16 divisors (see below), whose sum is σ = 54214665120. Its totient is φ = 7744952112.

The previous prime is 25171094401. The next prime is 25171094467. The reversal of 25171094442 is 24449017152.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 25171094442.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161353092 + ... + 161353247.

It is an arithmetic number, because the mean of its divisors is an integer number (3388416570).

Almost surely, 2^25171094442 is an apocalyptic number.

25171094442 is an abundant number, since it is smaller than the sum of its proper divisors (29043570678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25171094442 is a wasteful number, since it uses less digits than its factorization.

25171094442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322706357.

The product of its (nonzero) digits is 80640, while the sum is 39.

The spelling of 25171094442 in words is "twenty-five billion, one hundred seventy-one million, ninety-four thousand, four hundred forty-two".