111591222638 has 64 divisors (see below), whose sum is σ = 195792629760. Its totient is φ = 46717212672.

The previous prime is 111591222583. The next prime is 111591222641. The reversal of 111591222638 is 836222195111.

It is a junction number, because it is equal to n+sod(n) for n = 111591222595 and 111591222604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43034270 + ... + 43036862.

It is an arithmetic number, because the mean of its divisors is an integer number (3059259840).

Almost surely, 2^111591222638 is an apocalyptic number.

111591222638 is a deficient number, since it is larger than the sum of its proper divisors (84201407122).

111591222638 is a wasteful number, since it uses less digits than its factorization.

111591222638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3081.

The product of its digits is 51840, while the sum is 41.

The spelling of 111591222638 in words is "one hundred eleven billion, five hundred ninety-one million, two hundred twenty-two thousand, six hundred thirty-eight".