25510013325540 has 72 divisors (see below), whose sum is σ = 77400917455680. Its totient is φ = 6800864180544.

The previous prime is 25510013325493. The next prime is 25510013325551. The reversal of 25510013325540 is 4552331001552.

25510013325540 is a `hidden beast` number, since 2 + 5 + 5 + 100 + 1 + 3 + 3 + 2 + 5 + 540 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 25510013325495 and 25510013325504.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18132970 + ... + 19489089.

It is an arithmetic number, because the mean of its divisors is an integer number (1075012742440).

Almost surely, 2^{25510013325540} is an apocalyptic number.

25510013325540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25510013325540 is an abundant number, since it is smaller than the sum of its proper divisors (51890904130140).

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

25510013325540 is a wasteful number, since it uses less digits than its factorization.

25510013325540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37625841 (or 37625836 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

The spelling of 25510013325540 in words is "twenty-five trillion, five hundred ten billion, thirteen million, three hundred twenty-five thousand, five hundred forty".