26324657891 has 4 divisors (see below), whose sum is σ = 30085323312. Its totient is φ = 22563992472.

The previous prime is 26324657881. The next prime is 26324657929. The reversal of 26324657891 is 19875642362.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-26324657891 is a prime.

It is a super-2 number, since 2×26324657891² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26324657851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1880332700 + ... + 1880332713.

It is an arithmetic number, because the mean of its divisors is an integer number (7521330828).

Almost surely, 2^26324657891 is an apocalyptic number.

26324657891 is a deficient number, since it is larger than the sum of its proper divisors (3760665421).

26324657891 is an equidigital number, since it uses as much as digits as its factorization.

26324657891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3760665420.

The product of its digits is 4354560, while the sum is 53.

The spelling of 26324657891 in words is "twenty-six billion, three hundred twenty-four million, six hundred fifty-seven thousand, eight hundred ninety-one".