26149949879 has 2 divisors, whose sum is σ = 26149949880. Its totient is φ = 26149949878.

The previous prime is 26149949807. The next prime is 26149949887. The reversal of 26149949879 is 97894994162.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26149949879 is a prime.

It is a super-2 number, since 2×26149949879² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26149949279) 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 as a sum of consecutive naturals, namely, 13074974939 + 13074974940.

It is an arithmetic number, because the mean of its divisors is an integer number (13074974940).

Almost surely, 2^26149949879 is an apocalyptic number.

26149949879 is a deficient number, since it is larger than the sum of its proper divisors (1).

26149949879 is an equidigital number, since it uses as much as digits as its factorization.

26149949879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 70543872, while the sum is 68.

The spelling of 26149949879 in words is "twenty-six billion, one hundred forty-nine million, nine hundred forty-nine thousand, eight hundred seventy-nine".