111945533399 has 4 divisors (see below), whose sum is σ = 127937752464. Its totient is φ = 95953314336.

The previous prime is 111945533393. The next prime is 111945533437. The reversal of 111945533399 is 993335549111.

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

It is a cyclic number.

It is not a de Polignac number, because 111945533399 - 2¹² = 111945529303 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111945533399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111945533393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7996109522 + ... + 7996109535.

It is an arithmetic number, because the mean of its divisors is an integer number (31984438116).

Almost surely, 2^111945533399 is an apocalyptic number.

111945533399 is a deficient number, since it is larger than the sum of its proper divisors (15992219065).

111945533399 is an equidigital number, since it uses as much as digits as its factorization.

111945533399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15992219064.

The product of its digits is 1968300, while the sum is 53.

The spelling of 111945533399 in words is "one hundred eleven billion, nine hundred forty-five million, five hundred thirty-three thousand, three hundred ninety-nine".