81153931196 has 12 divisors (see below), whose sum is σ = 152943947352. Its totient is φ = 37455660528.

The previous prime is 81153931171. The next prime is 81153931207. The reversal of 81153931196 is 69113935118.

It is a self number, because there is not a number n which added to its sum of digits gives 81153931196.

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, 780326210 + ... + 780326313.

It is an arithmetic number, because the mean of its divisors is an integer number (12745328946).

Almost surely, 2^81153931196 is an apocalyptic number.

It is an amenable number.

81153931196 is a deficient number, since it is larger than the sum of its proper divisors (71790016156).

81153931196 is a wasteful number, since it uses less digits than its factorization.

81153931196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1560652540 (or 1560652538 counting only the distinct ones).

The product of its digits is 174960, while the sum is 47.

The spelling of 81153931196 in words is "eighty-one billion, one hundred fifty-three million, nine hundred thirty-one thousand, one hundred ninety-six".