25555123525 has 12 divisors (see below), whose sum is σ = 32002102404. Its totient is φ = 20241680000.

The previous prime is 25555123453. The next prime is 25555123543. The reversal of 25555123525 is 52532155552.

It can be written as a sum of positive squares in 6 ways, for example, as 3093806884 + 22461316641 = 55622^2 + 149871^2 .

It is not a de Polignac number, because 25555123525 - 2¹⁹ = 25554599237 is a prime.

It is a Duffinian number.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 5057896 + ... + 5062945.

It is an arithmetic number, because the mean of its divisors is an integer number (2666841867).

Almost surely, 2^25555123525 is an apocalyptic number.

25555123525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25555123525 is a deficient number, since it is larger than the sum of its proper divisors (6446978879).

25555123525 is a wasteful number, since it uses less digits than its factorization.

25555123525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10120952 (or 10120947 counting only the distinct ones).

The product of its digits is 375000, while the sum is 40.

The spelling of 25555123525 in words is "twenty-five billion, five hundred fifty-five million, one hundred twenty-three thousand, five hundred twenty-five".