11111110978829 has 2 divisors, whose sum is σ = 11111110978830. Its totient is φ = 11111110978828.

The previous prime is 11111110978823. The next prime is 11111110978843. The reversal of 11111110978829 is 92887901111111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10414161501604 + 696949477225 = 3227098^2 + 834835^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11111110978829 is a prime.

It is a super-2 number, since 2×11111110978829² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11111110978823) 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 as a sum of consecutive naturals, namely, 5555555489414 + 5555555489415.

It is an arithmetic number, because the mean of its divisors is an integer number (5555555489415).

Almost surely, 2^{11111110978829} is an apocalyptic number.

It is an amenable number.

11111110978829 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111110978829 is an equidigital number, since it uses as much as digits as its factorization.

11111110978829 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 50.

The spelling of 11111110978829 in words is "eleven trillion, one hundred eleven billion, one hundred ten million, nine hundred seventy-eight thousand, eight hundred twenty-nine".