10111245667889 has 4 divisors (see below), whose sum is σ = 10111253866356. Its totient is φ = 10111237469424.

The previous prime is 10111245667813. The next prime is 10111245667933. The reversal of 10111245667889 is 98876654211101.

It is a happy 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.

It can be written as a sum of positive squares in 2 ways, for example, as 5485821205489 + 4625424462400 = 2342183^2 + 2150680^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10111245667889 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10111245667189) 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, 1830854 + ... + 4855359.

It is an arithmetic number, because the mean of its divisors is an integer number (2527813466589).

Almost surely, 2^{10111245667889} is an apocalyptic number.

It is an amenable number.

10111245667889 is a deficient number, since it is larger than the sum of its proper divisors (8198467).

10111245667889 is an equidigital number, since it uses as much as digits as its factorization.

10111245667889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8198466.

The product of its (nonzero) digits is 5806080, while the sum is 59.

The spelling of 10111245667889 in words is "ten trillion, one hundred eleven billion, two hundred forty-five million, six hundred sixty-seven thousand, eight hundred eighty-nine".