25555852971 has 16 divisors (see below), whose sum is σ = 41302389120. Its totient is φ = 15488395560.

The previous prime is 25555852937. The next prime is 25555852979. The reversal of 25555852971 is 17925855552.

25555852971 is a `hidden beast` number, since 2 + 5 + 55 + 585 + 2 + 9 + 7 + 1 = 666.

It is not a de Polignac number, because 25555852971 - 2¹⁴ = 25555836587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25555852979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43023025 + ... + 43023618.

It is an arithmetic number, because the mean of its divisors is an integer number (2581399320).

Almost surely, 2^25555852971 is an apocalyptic number.

25555852971 is a deficient number, since it is larger than the sum of its proper divisors (15746536149).

25555852971 is a wasteful number, since it uses less digits than its factorization.

25555852971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86046663 (or 86046657 counting only the distinct ones).

The product of its digits is 6300000, while the sum is 54.

The spelling of 25555852971 in words is "twenty-five billion, five hundred fifty-five million, eight hundred fifty-two thousand, nine hundred seventy-one".