26364906891 has 32 divisors (see below), whose sum is σ = 39746641920. Its totient is φ = 17268606432.

The previous prime is 26364906857. The next prime is 26364906913. The reversal of 26364906891 is 19860946362.

26364906891 is a `hidden beast` number, since 2 + 6 + 3 + 6 + 490 + 68 + 91 = 666.

It is not a de Polignac number, because 26364906891 - 2²³ = 26356518283 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26364906091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 673821 + ... + 711873.

It is an arithmetic number, because the mean of its divisors is an integer number (1242082560).

Almost surely, 2^26364906891 is an apocalyptic number.

26364906891 is a deficient number, since it is larger than the sum of its proper divisors (13381735029).

26364906891 is a wasteful number, since it uses less digits than its factorization.

26364906891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38512 (or 38506 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 54.

The spelling of 26364906891 in words is "twenty-six billion, three hundred sixty-four million, nine hundred six thousand, eight hundred ninety-one".