25979708040 has 256 divisors, whose sum is σ = 96952101120. Its totient is φ = 5471600640.

The previous prime is 25979708021. The next prime is 25979708047. The reversal of 25979708040 is 4080797952.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (25979708047) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 247192 + ... + 336248.

It is an arithmetic number, because the mean of its divisors is an integer number (378719145).

Almost surely, 2^25979708040 is an apocalyptic number.

25979708040 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 25979708040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48476050560).

25979708040 is an abundant number, since it is smaller than the sum of its proper divisors (70972393080).

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

25979708040 is a wasteful number, since it uses less digits than its factorization.

25979708040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89112 (or 89108 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 51.

The spelling of 25979708040 in words is "twenty-five billion, nine hundred seventy-nine million, seven hundred eight thousand, forty".