111688765651 has 4 divisors (see below), whose sum is σ = 111692124400. Its totient is φ = 111685406904.

The previous prime is 111688765649. The next prime is 111688765687. The reversal of 111688765651 is 156567886111.

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 111688765651 - 2¹ = 111688765649 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111688765592 and 111688765601.

It is not an unprimeable number, because it can be changed into a prime (111688775651) 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, 1628991 + ... + 1696168.

It is an arithmetic number, because the mean of its divisors is an integer number (27923031100).

Almost surely, 2^111688765651 is an apocalyptic number.

111688765651 is a deficient number, since it is larger than the sum of its proper divisors (3358749).

111688765651 is an equidigital number, since it uses as much as digits as its factorization.

111688765651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3358748.

The product of its digits is 2419200, while the sum is 55.

The spelling of 111688765651 in words is "one hundred eleven billion, six hundred eighty-eight million, seven hundred sixty-five thousand, six hundred fifty-one".