25494869670 has 64 divisors (see below), whose sum is σ = 62606131200. Its totient is φ = 6642770688.

The previous prime is 25494869611. The next prime is 25494869671. The reversal of 25494869670 is 7696849452.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25494869671) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 179931 + ... + 288729.

It is an arithmetic number, because the mean of its divisors is an integer number (978220800).

Almost surely, 2^25494869670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25494869670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31303065600).

25494869670 is an abundant number, since it is smaller than the sum of its proper divisors (37111261530).

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

25494869670 is a wasteful number, since it uses less digits than its factorization.

25494869670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108989.

The product of its (nonzero) digits is 26127360, while the sum is 60.

The spelling of 25494869670 in words is "twenty-five billion, four hundred ninety-four million, eight hundred sixty-nine thousand, six hundred seventy".