25557388375542 has 64 divisors (see below), whose sum is σ = 54842573850624. Its totient is φ = 7924854654720.

The previous prime is 25557388375537. The next prime is 25557388375543. The reversal of 25557388375542 is 24557388375552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25557388375543) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21800223 + ... + 22942634.

It is an arithmetic number, because the mean of its divisors is an integer number (856915216416).

Almost surely, 2^{25557388375542} is an apocalyptic number.

25557388375542 is an abundant number, since it is smaller than the sum of its proper divisors (29285185475082).

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

25557388375542 is a wasteful number, since it uses less digits than its factorization.

25557388375542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44743013.

The product of its digits is 1411200000, while the sum is 69.

The spelling of 25557388375542 in words is "twenty-five trillion, five hundred fifty-seven billion, three hundred eighty-eight million, three hundred seventy-five thousand, five hundred forty-two".