25542104157 has 6 divisors (see below), whose sum is σ = 36894150462. Its totient is φ = 17028069432.

The previous prime is 25542104153. The next prime is 25542104171. The reversal of 25542104157 is 75140124552.

25542104157 is a `hidden beast` number, since 2 + 5 + 542 + 104 + 1 + 5 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 24487868196 + 1054235961 = 156486^2 + 32469^2 .

It is not a de Polignac number, because 25542104157 - 2² = 25542104153 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25542104153) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1419005778 + ... + 1419005795.

It is an arithmetic number, because the mean of its divisors is an integer number (6149025077).

Almost surely, 2^25542104157 is an apocalyptic number.

It is an amenable number.

25542104157 is a deficient number, since it is larger than the sum of its proper divisors (11352046305).

25542104157 is a wasteful number, since it uses less digits than its factorization.

25542104157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2838011579 (or 2838011576 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 36.

The spelling of 25542104157 in words is "twenty-five billion, five hundred forty-two million, one hundred four thousand, one hundred fifty-seven".