81400850683 has 16 divisors (see below), whose sum is σ = 87700432896. Its totient is φ = 75332473920.

The previous prime is 81400850669. The next prime is 81400850693. The reversal of 81400850683 is 38605800418.

It is a cyclic number.

It is not a de Polignac number, because 81400850683 - 2⁹ = 81400850171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81400850603) 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, 3830335 + ... + 3851527.

It is an arithmetic number, because the mean of its divisors is an integer number (5481277056).

Almost surely, 2^81400850683 is an apocalyptic number.

81400850683 is a deficient number, since it is larger than the sum of its proper divisors (6299582213).

81400850683 is a wasteful number, since it uses less digits than its factorization.

81400850683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26634.

The product of its (nonzero) digits is 184320, while the sum is 43.

The spelling of 81400850683 in words is "eighty-one billion, four hundred million, eight hundred fifty thousand, six hundred eighty-three".