25867420971 has 64 divisors (see below), whose sum is σ = 43743436800. Its totient is φ = 13256027136.

The previous prime is 25867420961. The next prime is 25867421003. The reversal of 25867420971 is 17902476852.

It is a happy number.

It is not a de Polignac number, because 25867420971 - 2⁹ = 25867420459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25867420921) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 875640 + ... + 904698.

It is an arithmetic number, because the mean of its divisors is an integer number (683491200).

Almost surely, 2^25867420971 is an apocalyptic number.

25867420971 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

25867420971 is a deficient number, since it is larger than the sum of its proper divisors (17876015829).

25867420971 is a wasteful number, since it uses less digits than its factorization.

25867420971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29208.

The product of its (nonzero) digits is 1693440, while the sum is 51.

The spelling of 25867420971 in words is "twenty-five billion, eight hundred sixty-seven million, four hundred twenty thousand, nine hundred seventy-one".