25105002125 has 32 divisors (see below), whose sum is σ = 36680297472. Its totient is φ = 16794960000.

The previous prime is 25105002101. The next prime is 25105002163. The reversal of 25105002125 is 52120050152.

It is not a de Polignac number, because 25105002125 - 2⁸ = 25105001869 is a prime.

It is a super-2 number, since 2×25105002125² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25105002125.

It is a congruent number.

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, 314021 + ... + 385770.

It is an arithmetic number, because the mean of its divisors is an integer number (1146259296).

Almost surely, 2^25105002125 is an apocalyptic number.

25105002125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25105002125 is a deficient number, since it is larger than the sum of its proper divisors (11575295347).

25105002125 is an equidigital number, since it uses as much as digits as its factorization.

25105002125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699854 (or 699844 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

Adding to 25105002125 its reverse (52120050152), we get a palindrome (77225052277).

The spelling of 25105002125 in words is "twenty-five billion, one hundred five million, two thousand, one hundred twenty-five".