26891872413 has 16 divisors (see below), whose sum is σ = 40982470656. Its totient is φ = 15365142000.

The previous prime is 26891872409. The next prime is 26891872493. The reversal of 26891872413 is 31427819862.

It is a happy number.

It is not a de Polignac number, because 26891872413 - 2² = 26891872409 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26891872493) 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, 148788 + ... + 275538.

It is an arithmetic number, because the mean of its divisors is an integer number (2561404416).

Almost surely, 2^26891872413 is an apocalyptic number.

It is an amenable number.

26891872413 is a deficient number, since it is larger than the sum of its proper divisors (14090598243).

26891872413 is a wasteful number, since it uses less digits than its factorization.

26891872413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136864.

The product of its digits is 1161216, while the sum is 51.

The spelling of 26891872413 in words is "twenty-six billion, eight hundred ninety-one million, eight hundred seventy-two thousand, four hundred thirteen".