26139744899 has 2 divisors, whose sum is σ = 26139744900. Its totient is φ = 26139744898.

The previous prime is 26139744889. The next prime is 26139744923. The reversal of 26139744899 is 99844793162.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26139744899 is a prime.

It is not a weakly prime, because it can be changed into another prime (26139744889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13069872449 + 13069872450.

It is an arithmetic number, because the mean of its divisors is an integer number (13069872450).

Almost surely, 2^26139744899 is an apocalyptic number.

26139744899 is a deficient number, since it is larger than the sum of its proper divisors (1).

26139744899 is an equidigital number, since it uses as much as digits as its factorization.

26139744899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23514624, while the sum is 62.

The spelling of 26139744899 in words is "twenty-six billion, one hundred thirty-nine million, seven hundred forty-four thousand, eight hundred ninety-nine".