111687878051 has 2 divisors, whose sum is σ = 111687878052. Its totient is φ = 111687878050.

The previous prime is 111687878039. The next prime is 111687878053. The reversal of 111687878051 is 150878786111.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111687878051 is a prime.

Together with 111687878053, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 111687877984 and 111687878002.

It is not a weakly prime, because it can be changed into another prime (111687878053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55843939025 + 55843939026.

It is an arithmetic number, because the mean of its divisors is an integer number (55843939026).

Almost surely, 2^111687878051 is an apocalyptic number.

111687878051 is a deficient number, since it is larger than the sum of its proper divisors (1).

111687878051 is an equidigital number, since it uses as much as digits as its factorization.

111687878051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 752640, while the sum is 53.

The spelling of 111687878051 in words is "one hundred eleven billion, six hundred eighty-seven million, eight hundred seventy-eight thousand, fifty-one".