81769562076862 has 16 divisors (see below), whose sum is σ = 133808291983872. Its totient is φ = 37166995528920.

The previous prime is 81769562076857. The next prime is 81769562076869. The reversal of 81769562076862 is 26867026596718.

It is a super-2 number, since 2×81769562076862² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81769562076869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48514248 + ... + 50171419.

It is an arithmetic number, because the mean of its divisors is an integer number (8363018248992).

Almost surely, 2^{81769562076862} is an apocalyptic number.

81769562076862 is a deficient number, since it is larger than the sum of its proper divisors (52038729907010).

81769562076862 is a wasteful number, since it uses less digits than its factorization.

81769562076862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98723343.

The product of its (nonzero) digits is 731566080, while the sum is 73.

The spelling of 81769562076862 in words is "eighty-one trillion, seven hundred sixty-nine billion, five hundred sixty-two million, seventy-six thousand, eight hundred sixty-two".