61111677889 has 16 divisors (see below), whose sum is σ = 63099025920. Its totient is φ = 59149479040.

The previous prime is 61111677859. The next prime is 61111677899. The reversal of 61111677889 is 98877611116.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 61111677889 - 2¹¹ = 61111675841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61111677859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3388554 + ... + 3406540.

It is an arithmetic number, because the mean of its divisors is an integer number (3943689120).

Almost surely, 2^61111677889 is an apocalyptic number.

It is an amenable number.

61111677889 is a deficient number, since it is larger than the sum of its proper divisors (1987348031).

61111677889 is a wasteful number, since it uses less digits than its factorization.

61111677889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18680.

The product of its digits is 1016064, while the sum is 55.

The spelling of 61111677889 in words is "sixty-one billion, one hundred eleven million, six hundred seventy-seven thousand, eight hundred eighty-nine".