25650858240 has 648 divisors, whose sum is σ = 105121808064. Its totient is φ = 5656780800.

The previous prime is 25650858223. The next prime is 25650858281. The reversal of 25650858240 is 4285805652.

It is a happy number.

25650858240 is a `hidden beast` number, since 2 + 5 + 65 + 0 + 8 + 582 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 77494875 + ... + 77495205.

Almost surely, 2^25650858240 is an apocalyptic number.

25650858240 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 25650858240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52560904032).

25650858240 is an abundant number, since it is smaller than the sum of its proper divisors (79470949824).

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

25650858240 is a wasteful number, since it uses less digits than its factorization.

25650858240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427 (or 379 counting only the distinct ones).

The product of its (nonzero) digits is 768000, while the sum is 45.

The spelling of 25650858240 in words is "twenty-five billion, six hundred fifty million, eight hundred fifty-eight thousand, two hundred forty".