25102481386440 has 128 divisors (see below), whose sum is σ = 75398655600000. Its totient is φ = 6685891829760.

The previous prime is 25102481386429. The next prime is 25102481386453. The reversal of 25102481386440 is 4468318420152.

It is a self number, because there is not a number n which added to its sum of digits gives 25102481386440.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 379313194 + ... + 379379366.

It is an arithmetic number, because the mean of its divisors is an integer number (589051996875).

Almost surely, 2^{25102481386440} is an apocalyptic number.

25102481386440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25102481386440 is an abundant number, since it is smaller than the sum of its proper divisors (50296174213560).

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

25102481386440 is a wasteful number, since it uses less digits than its factorization.

25102481386440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69967 (or 69963 counting only the distinct ones).

The product of its (nonzero) digits is 1474560, while the sum is 48.

The spelling of 25102481386440 in words is "twenty-five trillion, one hundred two billion, four hundred eighty-one million, three hundred eighty-six thousand, four hundred forty".