25620146887171 has 4 divisors (see below), whose sum is σ = 26734066317072. Its totient is φ = 24506227457272.

The previous prime is 25620146887129. The next prime is 25620146887183. The reversal of 25620146887171 is 17178864102652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25620146887171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25620146882171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 556959714916 + ... + 556959714961.

It is an arithmetic number, because the mean of its divisors is an integer number (6683516579268).

Almost surely, 2^{25620146887171} is an apocalyptic number.

25620146887171 is a deficient number, since it is larger than the sum of its proper divisors (1113919429901).

25620146887171 is a wasteful number, since it uses less digits than its factorization.

25620146887171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1113919429900.

The product of its (nonzero) digits is 9031680, while the sum is 58.

The spelling of 25620146887171 in words is "twenty-five trillion, six hundred twenty billion, one hundred forty-six million, eight hundred eighty-seven thousand, one hundred seventy-one".