81156868114 has 16 divisors (see below), whose sum is σ = 139600899648. Its totient is φ = 34662804912.

The previous prime is 81156868081. The next prime is 81156868181. The reversal of 81156868114 is 41186865118.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9888252 + ... + 9896455.

It is an arithmetic number, because the mean of its divisors is an integer number (8725056228).

Almost surely, 2^81156868114 is an apocalyptic number.

81156868114 is a deficient number, since it is larger than the sum of its proper divisors (58444031534).

81156868114 is a wasteful number, since it uses less digits than its factorization.

81156868114 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19785009.

The product of its digits is 368640, while the sum is 49.

The spelling of 81156868114 in words is "eighty-one billion, one hundred fifty-six million, eight hundred sixty-eight thousand, one hundred fourteen".