81345862066422 has 64 divisors (see below), whose sum is σ = 167216050450944. Its totient is φ = 26362357251840.

The previous prime is 81345862066421. The next prime is 81345862066453. The reversal of 81345862066422 is 22466026854318.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81345862066421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1614716898 + ... + 1614767274.

It is an arithmetic number, because the mean of its divisors is an integer number (2612750788296).

Almost surely, 2^{81345862066422} is an apocalyptic number.

81345862066422 is an abundant number, since it is smaller than the sum of its proper divisors (85870188384522).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81345862066422 is a wasteful number, since it uses less digits than its factorization.

81345862066422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55813.

The product of its (nonzero) digits is 26542080, while the sum is 57.

The spelling of 81345862066422 in words is "eighty-one trillion, three hundred forty-five billion, eight hundred sixty-two million, sixty-six thousand, four hundred twenty-two".