25400743956 has 144 divisors (see below), whose sum is σ = 77869209600. Its totient is φ = 6824068416.

The previous prime is 25400743939. The next prime is 25400743961. The reversal of 25400743956 is 65934700452.

25400743956 is a `hidden beast` number, since 2 + 540 + 0 + 74 + 39 + 5 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 304825 + ... + 379103.

It is an arithmetic number, because the mean of its divisors is an integer number (540758400).

Almost surely, 2^25400743956 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25400743956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38934604800).

25400743956 is an abundant number, since it is smaller than the sum of its proper divisors (52468465644).

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

25400743956 is a wasteful number, since it uses less digits than its factorization.

25400743956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74378 (or 74373 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 45.

The spelling of 25400743956 in words is "twenty-five billion, four hundred million, seven hundred forty-three thousand, nine hundred fifty-six".