111798615769 has 3 divisors (see below), whose sum is σ = 111798950133. Its totient is φ = 111798281406.

The previous prime is 111798615767. The next prime is 111798615793. The reversal of 111798615769 is 967516897111.

The square root of 111798615769 is 334363.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 967516897111 = 32401 ⋅29860711.

It is not a de Polignac number, because 111798615769 - 2¹ = 111798615767 is a prime.

It is a super-2 number, since 2×111798615769² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111798615767) 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 in 2 ways as a sum of consecutive naturals, for example, 167182 + ... + 501544.

It is an arithmetic number, because the mean of its divisors is an integer number (37266316711).

Almost surely, 2^111798615769 is an apocalyptic number.

111798615769 is the 334363-rd square number.

111798615769 is the 167182-nd centered octagonal number.

It is an amenable number.

111798615769 is a deficient number, since it is larger than the sum of its proper divisors (334364).

111798615769 is an frugal number, since it uses more digits than its factorization.

111798615769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668726 (or 334363 counting only the distinct ones).

The product of its digits is 5715360, while the sum is 61.

The spelling of 111798615769 in words is "one hundred eleven billion, seven hundred ninety-eight million, six hundred fifteen thousand, seven hundred sixty-nine".