111670945890 has 128 divisors (see below), whose sum is σ = 324643189248. Its totient is φ = 23999016960.

The previous prime is 111670945861. The next prime is 111670945921. The reversal of 111670945890 is 98549076111.

111670945890 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3629652 + ... + 3660288.

It is an arithmetic number, because the mean of its divisors is an integer number (2536274916).

Almost surely, 2^111670945890 is an apocalyptic number.

111670945890 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 111670945890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162321594624).

111670945890 is an abundant number, since it is smaller than the sum of its proper divisors (212972243358).

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

111670945890 is a wasteful number, since it uses less digits than its factorization.

111670945890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31692.

The product of its (nonzero) digits is 544320, while the sum is 51.

The spelling of 111670945890 in words is "one hundred eleven billion, six hundred seventy million, nine hundred forty-five thousand, eight hundred ninety".