18649726079 has 2 divisors, whose sum is σ = 18649726080. Its totient is φ = 18649726078.

The previous prime is 18649726061. The next prime is 18649726133. The reversal of 18649726079 is 97062794681.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18649726079 - 2¹² = 18649721983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18649722079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9324863039 + 9324863040.

It is an arithmetic number, because the mean of its divisors is an integer number (9324863040).

Almost surely, 2^18649726079 is an apocalyptic number.

18649726079 is a deficient number, since it is larger than the sum of its proper divisors (1).

18649726079 is an equidigital number, since it uses as much as digits as its factorization.

18649726079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9144576, while the sum is 59.

The spelling of 18649726079 in words is "eighteen billion, six hundred forty-nine million, seven hundred twenty-six thousand, seventy-nine".