26891770807 has 16 divisors (see below), whose sum is σ = 31252753152. Its totient is φ = 22867816320.

The previous prime is 26891770769. The next prime is 26891770819. The reversal of 26891770807 is 70807719862.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 26891770807 - 2²³ = 26883382199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26891770207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 410643 + ... + 471604.

It is an arithmetic number, because the mean of its divisors is an integer number (1953297072).

Almost surely, 2^26891770807 is an apocalyptic number.

26891770807 is a deficient number, since it is larger than the sum of its proper divisors (4360982345).

26891770807 is a wasteful number, since it uses less digits than its factorization.

26891770807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 882438.

The product of its (nonzero) digits is 2370816, while the sum is 55.

The spelling of 26891770807 in words is "twenty-six billion, eight hundred ninety-one million, seven hundred seventy thousand, eight hundred seven".