26015907891 has 16 divisors (see below), whose sum is σ = 36775910304. Its totient is φ = 16302564864.

The previous prime is 26015907889. The next prime is 26015907893. The reversal of 26015907891 is 19870951062.

It is an interprime number because it is at equal distance from previous prime (26015907889) and next prime (26015907893).

It is not a de Polignac number, because 26015907891 - 2¹ = 26015907889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26015907891.

It is not an unprimeable number, because it can be changed into a prime (26015907893) 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, 290536 + ... + 369381.

It is an arithmetic number, because the mean of its divisors is an integer number (2298494394).

Almost surely, 2^26015907891 is an apocalyptic number.

26015907891 is a deficient number, since it is larger than the sum of its proper divisors (10760002413).

26015907891 is a wasteful number, since it uses less digits than its factorization.

26015907891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660710.

The product of its (nonzero) digits is 272160, while the sum is 48.

The spelling of 26015907891 in words is "twenty-six billion, fifteen million, nine hundred seven thousand, eight hundred ninety-one".