25115401320 has 64 divisors (see below), whose sum is σ = 75381848640. Its totient is φ = 6694272000.

The previous prime is 25115401319. The next prime is 25115401349. The reversal of 25115401320 is 2310451152.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210895 + ... + 307745.

It is an arithmetic number, because the mean of its divisors is an integer number (1177841385).

Almost surely, 2^25115401320 is an apocalyptic number.

25115401320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25115401320 is an abundant number, since it is smaller than the sum of its proper divisors (50266447320).

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

25115401320 is a wasteful number, since it uses less digits than its factorization.

25115401320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99026 (or 99022 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 25115401320 its reverse (2310451152), we get a palindrome (27425852472).

The spelling of 25115401320 in words is "twenty-five billion, one hundred fifteen million, four hundred one thousand, three hundred twenty".