111680972569 has 2 divisors, whose sum is σ = 111680972570. Its totient is φ = 111680972568.

The previous prime is 111680972567. The next prime is 111680972617. The reversal of 111680972569 is 965279086111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92180246544 + 19500726025 = 303612^2 + 139645^2 .

It is a cyclic number.

It is not a de Polignac number, because 111680972569 - 2¹ = 111680972567 is a prime.

It is a super-2 number, since 2×111680972569² (a number of 23 digits) contains 22 as substring.

Together with 111680972567, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (111680972567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55840486284 + 55840486285.

It is an arithmetic number, because the mean of its divisors is an integer number (55840486285).

Almost surely, 2^111680972569 is an apocalyptic number.

It is an amenable number.

111680972569 is a deficient number, since it is larger than the sum of its proper divisors (1).

111680972569 is an equidigital number, since it uses as much as digits as its factorization.

111680972569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1632960, while the sum is 55.

The spelling of 111680972569 in words is "one hundred eleven billion, six hundred eighty million, nine hundred seventy-two thousand, five hundred sixty-nine".