25391140320 has 384 divisors, whose sum is σ = 99800515584. Its totient is φ = 5283201024.

The previous prime is 25391140273. The next prime is 25391140331. The reversal of 25391140320 is 2304119352.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3184659 + ... + 3192621.

It is an arithmetic number, because the mean of its divisors is an integer number (259897176).

Almost surely, 2^25391140320 is an apocalyptic number.

25391140320 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 25391140320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49900257792).

25391140320 is an abundant number, since it is smaller than the sum of its proper divisors (74409375264).

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

25391140320 is a wasteful number, since it uses less digits than its factorization.

25391140320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8074 (or 8066 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

Adding to 25391140320 its reverse (2304119352), we get a palindrome (27695259672).

The spelling of 25391140320 in words is "twenty-five billion, three hundred ninety-one million, one hundred forty thousand, three hundred twenty".