25556240142 has 24 divisors (see below), whose sum is σ = 55438841016. Its totient is φ = 8508440976.

The previous prime is 25556240123. The next prime is 25556240147. The reversal of 25556240142 is 24104265552.

25556240142 is a `hidden beast` number, since 2 + 55 + 562 + 4 + 0 + 1 + 42 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 25556240097 and 25556240106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25556240147) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 843513 + ... + 873284.

It is an arithmetic number, because the mean of its divisors is an integer number (2309951709).

Almost surely, 2^25556240142 is an apocalyptic number.

25556240142 is an abundant number, since it is smaller than the sum of its proper divisors (29882600874).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25556240142 is a wasteful number, since it uses less digits than its factorization.

25556240142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1717632 (or 1717629 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 36.

The spelling of 25556240142 in words is "twenty-five billion, five hundred fifty-six million, two hundred forty thousand, one hundred forty-two".