26171902807 has 24 divisors (see below), whose sum is σ = 27360169200. Its totient is φ = 25025264640.

The previous prime is 26171902793. The next prime is 26171902843. The reversal of 26171902807 is 70820917162.

It is a de Polignac number, because none of the positive numbers 2^k-26171902807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26171912807) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21294669 + ... + 21295897.

It is an arithmetic number, because the mean of its divisors is an integer number (1140007050).

Almost surely, 2^26171902807 is an apocalyptic number.

26171902807 is a deficient number, since it is larger than the sum of its proper divisors (1188266393).

26171902807 is an equidigital number, since it uses as much as digits as its factorization.

26171902807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1507 (or 1446 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 43.

The spelling of 26171902807 in words is "twenty-six billion, one hundred seventy-one million, nine hundred two thousand, eight hundred seven".