25557428086986 has 16 divisors (see below), whose sum is σ = 51487957315584. Its totient is φ = 8456959172064.

The previous prime is 25557428086979. The next prime is 25557428086991. The reversal of 25557428086986 is 68968082475552.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 15545880010 + ... + 15545881653.

It is an arithmetic number, because the mean of its divisors is an integer number (3217997332224).

Almost surely, 2^{25557428086986} is an apocalyptic number.

25557428086986 is an abundant number, since it is smaller than the sum of its proper divisors (25930529228598).

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

25557428086986 is a wasteful number, since it uses less digits than its factorization.

25557428086986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31091761805.

The product of its (nonzero) digits is 2322432000, while the sum is 75.

The spelling of 25557428086986 in words is "twenty-five trillion, five hundred fifty-seven billion, four hundred twenty-eight million, eighty-six thousand, nine hundred eighty-six".