111564117993 has 4 divisors (see below), whose sum is σ = 148752157328. Its totient is φ = 74376078660.

The previous prime is 111564117967. The next prime is 111564118013. The reversal of 111564117993 is 399711465111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 111564117993 - 2⁹ = 111564117481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111564117913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18594019663 + ... + 18594019668.

It is an arithmetic number, because the mean of its divisors is an integer number (37188039332).

Almost surely, 2^111564117993 is an apocalyptic number.

It is an amenable number.

111564117993 is a deficient number, since it is larger than the sum of its proper divisors (37188039335).

111564117993 is an equidigital number, since it uses as much as digits as its factorization.

111564117993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37188039334.

The product of its digits is 204120, while the sum is 48.

The spelling of 111564117993 in words is "one hundred eleven billion, five hundred sixty-four million, one hundred seventeen thousand, nine hundred ninety-three".