81268186342134 has 48 divisors (see below), whose sum is σ = 178751685173040. Its totient is φ = 24613489665600.

The previous prime is 81268186342111. The next prime is 81268186342151. The reversal of 81268186342134 is 43124368186218.

It is a super-2 number, since 2×81268186342134² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28724049 + ... + 31426220.

It is an arithmetic number, because the mean of its divisors is an integer number (3723993441105).

Almost surely, 2^{81268186342134} is an apocalyptic number.

81268186342134 is an abundant number, since it is smaller than the sum of its proper divisors (97483498830906).

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

81268186342134 is a wasteful number, since it uses less digits than its factorization.

81268186342134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60152157 (or 60152146 counting only the distinct ones).

The product of its digits is 10616832, while the sum is 57.

The spelling of 81268186342134 in words is "eighty-one trillion, two hundred sixty-eight billion, one hundred eighty-six million, three hundred forty-two thousand, one hundred thirty-four".