81116414157889 has 16 divisors (see below), whose sum is σ = 89005499305920. Its totient is φ = 73313172135360.

The previous prime is 81116414157833. The next prime is 81116414157893. The reversal of 81116414157889 is 98875141461118.

It is a cyclic number.

It is not a de Polignac number, because 81116414157889 - 2¹³ = 81116414149697 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 81116414157889.

It is not an unprimeable number, because it can be changed into a prime (81116414151889) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50489227 + ... + 52071055.

It is an arithmetic number, because the mean of its divisors is an integer number (5562843706620).

Almost surely, 2^{81116414157889} is an apocalyptic number.

It is an amenable number.

81116414157889 is a deficient number, since it is larger than the sum of its proper divisors (7889085148031).

81116414157889 is a wasteful number, since it uses less digits than its factorization.

81116414157889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1608960.

The product of its digits is 15482880, while the sum is 64.

The spelling of 81116414157889 in words is "eighty-one trillion, one hundred sixteen billion, four hundred fourteen million, one hundred fifty-seven thousand, eight hundred eighty-nine".