11815458998639 has 2 divisors, whose sum is σ = 11815458998640. Its totient is φ = 11815458998638.

The previous prime is 11815458998611. The next prime is 11815458998669. The reversal of 11815458998639 is 93689985451811.

11815458998639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11815458998639 - 2⁸ = 11815458998383 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11815458998639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11815458998669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5907729499319 + 5907729499320.

It is an arithmetic number, because the mean of its divisors is an integer number (5907729499320).

Almost surely, 2^{11815458998639} is an apocalyptic number.

11815458998639 is a deficient number, since it is larger than the sum of its proper divisors (1).

11815458998639 is an equidigital number, since it uses as much as digits as its factorization.

11815458998639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 671846400, while the sum is 77.

The spelling of 11815458998639 in words is "eleven trillion, eight hundred fifteen billion, four hundred fifty-eight million, nine hundred ninety-eight thousand, six hundred thirty-nine".