25111530025 has 36 divisors (see below), whose sum is σ = 34796765052. Its totient is φ = 17912263680.

The previous prime is 25111530023. The next prime is 25111530029. The reversal of 25111530025 is 52003511152.

It can be written as a sum of positive squares in 6 ways, for example, as 499254336 + 24612275689 = 22344^2 + 156883^2 .

It is not a de Polignac number, because 25111530025 - 2¹ = 25111530023 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25111530023) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 71589 + ... + 235261.

It is an arithmetic number, because the mean of its divisors is an integer number (966576807).

Almost surely, 2^25111530025 is an apocalyptic number.

25111530025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25111530025 is a deficient number, since it is larger than the sum of its proper divisors (9685235027).

25111530025 is a wasteful number, since it uses less digits than its factorization.

25111530025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163738 (or 163714 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 25.

The spelling of 25111530025 in words is "twenty-five billion, one hundred eleven million, five hundred thirty thousand, twenty-five".