26121951311 has 4 divisors (see below), whose sum is σ = 26122436952. Its totient is φ = 26121465672.

The previous prime is 26121951227. The next prime is 26121951329. The reversal of 26121951311 is 11315912162.

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

It is a cyclic number.

It is not a de Polignac number, because 26121951311 - 2²² = 26117757007 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 (26121951211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150416 + ... + 273621.

It is an arithmetic number, because the mean of its divisors is an integer number (6530609238).

Almost surely, 2^26121951311 is an apocalyptic number.

26121951311 is a deficient number, since it is larger than the sum of its proper divisors (485641).

26121951311 is an equidigital number, since it uses as much as digits as its factorization.

26121951311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485640.

The product of its digits is 3240, while the sum is 32.

The spelling of 26121951311 in words is "twenty-six billion, one hundred twenty-one million, nine hundred fifty-one thousand, three hundred eleven".