25726431528 has 384 divisors, whose sum is σ = 87699456000. Its totient is φ = 6647546880.

The previous prime is 25726431527. The next prime is 25726431571. The reversal of 25726431528 is 82513462752.

25726431528 is a `hidden beast` number, since 2 + 57 + 264 + 315 + 28 = 666.

It is not an unprimeable number, because it can be changed into a prime (25726431527) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 23451076 + ... + 23452172.

It is an arithmetic number, because the mean of its divisors is an integer number (228384000).

Almost surely, 2^25726431528 is an apocalyptic number.

25726431528 is a gapful number since it is divisible by the number (28) 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 25726431528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43849728000).

25726431528 is an abundant number, since it is smaller than the sum of its proper divisors (61973024472).

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

25726431528 is a wasteful number, since it uses less digits than its factorization.

25726431528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1245 (or 1238 counting only the distinct ones).

The product of its digits is 806400, while the sum is 45.

The spelling of 25726431528 in words is "twenty-five billion, seven hundred twenty-six million, four hundred thirty-one thousand, five hundred twenty-eight".