81268186342132 has 12 divisors (see below), whose sum is σ = 142219593675936. Its totient is φ = 40634016720440.

The previous prime is 81268186342111. The next prime is 81268186342151. The reversal of 81268186342132 is 23124368186218.

It is a happy number.

It is a super-2 number, since 2×81268186342132² (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 3 ways as a sum of consecutive naturals, for example, 16686658 + ... + 20999545.

It is an arithmetic number, because the mean of its divisors is an integer number (11851632806328).

Almost surely, 2^{81268186342132} is an apocalyptic number.

It is an amenable number.

81268186342132 is a deficient number, since it is larger than the sum of its proper divisors (60951407333804).

81268186342132 is a wasteful number, since it uses less digits than its factorization.

81268186342132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38225318 (or 38225316 counting only the distinct ones).

The product of its digits is 5308416, while the sum is 55.

The spelling of 81268186342132 in words is "eighty-one trillion, two hundred sixty-eight billion, one hundred eighty-six million, three hundred forty-two thousand, one hundred thirty-two".