111615999990 has 128 divisors (see below), whose sum is σ = 304097587200. Its totient is φ = 25981011840.

The previous prime is 111615999977. The next prime is 111615999991. The reversal of 111615999990 is 99999516111.

111615999990 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111615999991) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 770551 + ... + 903869.

It is an arithmetic number, because the mean of its divisors is an integer number (2375762400).

Almost surely, 2^111615999990 is an apocalyptic number.

111615999990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 111615999990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152048793600).

111615999990 is an abundant number, since it is smaller than the sum of its proper divisors (192481587210).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111615999990 is a wasteful number, since it uses less digits than its factorization.

111615999990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133442.

The product of its (nonzero) digits is 1771470, while the sum is 60.

The spelling of 111615999990 in words is "one hundred eleven billion, six hundred fifteen million, nine hundred ninety-nine thousand, nine hundred ninety".