111990350158 has 4 divisors (see below), whose sum is σ = 167985525240. Its totient is φ = 55995175078.

The previous prime is 111990350077. The next prime is 111990350189. The reversal of 111990350158 is 851053099111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 851053099111 = 23 ⋅37002308657.

It is a super-2 number, since 2×111990350158² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27997587538 + ... + 27997587541.

It is an arithmetic number, because the mean of its divisors is an integer number (41996381310).

Almost surely, 2^111990350158 is an apocalyptic number.

111990350158 is a deficient number, since it is larger than the sum of its proper divisors (55995175082).

111990350158 is an equidigital number, since it uses as much as digits as its factorization.

111990350158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55995175081.

The product of its (nonzero) digits is 48600, while the sum is 43.

The spelling of 111990350158 in words is "one hundred eleven billion, nine hundred ninety million, three hundred fifty thousand, one hundred fifty-eight".