111551615443 has 2 divisors, whose sum is σ = 111551615444. Its totient is φ = 111551615442.

The previous prime is 111551615429. The next prime is 111551615503. The reversal of 111551615443 is 344516155111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111551615443 - 2⁵ = 111551615411 is a prime.

It is not a weakly prime, because it can be changed into another prime (111551615143) by changing a digit.

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, 55775807721 + 55775807722.

It is an arithmetic number, because the mean of its divisors is an integer number (55775807722).

Almost surely, 2^111551615443 is an apocalyptic number.

111551615443 is a deficient number, since it is larger than the sum of its proper divisors (1).

111551615443 is an equidigital number, since it uses as much as digits as its factorization.

111551615443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36000, while the sum is 37.

The spelling of 111551615443 in words is "one hundred eleven billion, five hundred fifty-one million, six hundred fifteen thousand, four hundred forty-three".