81412746186 has 32 divisors (see below), whose sum is σ = 166150595520. Its totient is φ = 26586539264.

The previous prime is 81412746161. The next prime is 81412746269. The reversal of 81412746186 is 68164721418.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 288735 + ... + 496178.

It is an arithmetic number, because the mean of its divisors is an integer number (5192206110).

Almost surely, 2^81412746186 is an apocalyptic number.

81412746186 is an abundant number, since it is smaller than the sum of its proper divisors (84737849334).

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

81412746186 is a wasteful number, since it uses less digits than its factorization.

81412746186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785270.

The product of its digits is 516096, while the sum is 48.

The spelling of 81412746186 in words is "eighty-one billion, four hundred twelve million, seven hundred forty-six thousand, one hundred eighty-six".