25103121440 has 48 divisors (see below), whose sum is σ = 59670027648. Its totient is φ = 9979635456.

The previous prime is 25103121427. The next prime is 25103121469. The reversal of 25103121440 is 4412130152.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 455192 + ... + 507351.

It is an arithmetic number, because the mean of its divisors is an integer number (1243125576).

Almost surely, 2^25103121440 is an apocalyptic number.

25103121440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25103121440 is an abundant number, since it is smaller than the sum of its proper divisors (34566906208).

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

25103121440 is a wasteful number, since it uses less digits than its factorization.

25103121440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962721 (or 962713 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 25103121440 its reverse (4412130152), we get a palindrome (29515251592).

The spelling of 25103121440 in words is "twenty-five billion, one hundred three million, one hundred twenty-one thousand, four hundred forty".