26171902806 has 16 divisors (see below), whose sum is σ = 59821492224. Its totient is φ = 7477686504.

The previous prime is 26171902793. The next prime is 26171902843. The reversal of 26171902806 is 60820917162.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 623140543 = 26171902806 / (2 + 6 + 1 + 7 + 1 + 9 + 0 + 2 + 8 + 0 + 6).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 311570230 + ... + 311570313.

It is an arithmetic number, because the mean of its divisors is an integer number (3738843264).

Almost surely, 2^26171902806 is an apocalyptic number.

26171902806 is an abundant number, since it is smaller than the sum of its proper divisors (33649589418).

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

26171902806 is a wasteful number, since it uses less digits than its factorization.

26171902806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623140555.

The product of its (nonzero) digits is 72576, while the sum is 42.

The spelling of 26171902806 in words is "twenty-six billion, one hundred seventy-one million, nine hundred two thousand, eight hundred six".