25500561157 has 16 divisors (see below), whose sum is σ = 27044462592. Its totient is φ = 24008042160.

The previous prime is 25500561133. The next prime is 25500561161. The reversal of 25500561157 is 75116500552.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25500561157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25500531157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190918 + ... + 295720.

It is an arithmetic number, because the mean of its divisors is an integer number (1690278912).

Almost surely, 2^25500561157 is an apocalyptic number.

It is an amenable number.

25500561157 is a deficient number, since it is larger than the sum of its proper divisors (1543901435).

25500561157 is a wasteful number, since it uses less digits than its factorization.

25500561157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105048.

The product of its (nonzero) digits is 52500, while the sum is 37.

The spelling of 25500561157 in words is "twenty-five billion, five hundred million, five hundred sixty-one thousand, one hundred fifty-seven".