11111109999958 has 4 divisors (see below), whose sum is σ = 16666664999940. Its totient is φ = 5555554999978.

The previous prime is 11111109999937. The next prime is 11111109999959. The reversal of 11111109999958 is 85999990111111.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 11111109999958.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111109999959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2777777499988 + ... + 2777777499991.

It is an arithmetic number, because the mean of its divisors is an integer number (4166666249985).

Almost surely, 2^{11111109999958} is an apocalyptic number.

11111109999958 is a deficient number, since it is larger than the sum of its proper divisors (5555554999982).

11111109999958 is an equidigital number, since it uses as much as digits as its factorization.

11111109999958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5555554999981.

The product of its (nonzero) digits is 2361960, while the sum is 64.

The spelling of 11111109999958 in words is "eleven trillion, one hundred eleven billion, one hundred nine million, nine hundred ninety-nine thousand, nine hundred fifty-eight".