81114747670 has 16 divisors (see below), whose sum is σ = 159279868368. Its totient is φ = 29496271840.

The previous prime is 81114747647. The next prime is 81114747677. The reversal of 81114747670 is 7674741118.

It is a self number, because there is not a number n which added to its sum of digits gives 81114747670.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81114747677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 368703289 + ... + 368703508.

It is an arithmetic number, because the mean of its divisors is an integer number (9954991773).

Almost surely, 2^81114747670 is an apocalyptic number.

81114747670 is a deficient number, since it is larger than the sum of its proper divisors (78165120698).

81114747670 is a wasteful number, since it uses less digits than its factorization.

81114747670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737406815.

The product of its (nonzero) digits is 263424, while the sum is 46.

The spelling of 81114747670 in words is "eighty-one billion, one hundred fourteen million, seven hundred forty-seven thousand, six hundred seventy".