81120214364 has 12 divisors (see below), whose sum is σ = 162240428784. Its totient is φ = 34765806144.

The previous prime is 81120214363. The next prime is 81120214367. The reversal of 81120214364 is 46341202118.

81120214364 is an admirable number.

It is a super-2 number, since 2×81120214364² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 81120214364.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81120214363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1448575229 + ... + 1448575284.

It is an arithmetic number, because the mean of its divisors is an integer number (13520035732).

Almost surely, 2^81120214364 is an apocalyptic number.

It is an amenable number.

81120214364 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

81120214364 is a wasteful number, since it uses less digits than its factorization.

81120214364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2897150524 (or 2897150522 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The spelling of 81120214364 in words is "eighty-one billion, one hundred twenty million, two hundred fourteen thousand, three hundred sixty-four".