25373104640 has 160 divisors (see below), whose sum is σ = 68965585920. Its totient is φ = 8875229184.

The previous prime is 25373104609. The next prime is 25373104661. The reversal of 25373104640 is 4640137352.

It is a tau number, because it is divible by the number of its divisors (160).

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 25373104640.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 612257 + ... + 652383.

It is an arithmetic number, because the mean of its divisors is an integer number (431034912).

Almost surely, 2^25373104640 is an apocalyptic number.

25373104640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25373104640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34482792960).

25373104640 is an abundant number, since it is smaller than the sum of its proper divisors (43592481280).

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

25373104640 is a wasteful number, since it uses less digits than its factorization.

25373104640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40182 (or 40166 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 35.

The spelling of 25373104640 in words is "twenty-five billion, three hundred seventy-three million, one hundred four thousand, six hundred forty".