111665628598 has 4 divisors (see below), whose sum is σ = 167498442900. Its totient is φ = 55832814298.

The previous prime is 111665628587. The next prime is 111665628629. The reversal of 111665628598 is 895826566111.

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

It is a super-2 number, since 2×111665628598² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27916407148 + ... + 27916407151.

It is an arithmetic number, because the mean of its divisors is an integer number (41874610725).

Almost surely, 2^111665628598 is an apocalyptic number.

111665628598 is a deficient number, since it is larger than the sum of its proper divisors (55832814302).

111665628598 is an equidigital number, since it uses as much as digits as its factorization.

111665628598 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55832814301.

The product of its digits is 6220800, while the sum is 58.

The spelling of 111665628598 in words is "one hundred eleven billion, six hundred sixty-five million, six hundred twenty-eight thousand, five hundred ninety-eight".