81134430932 has 6 divisors (see below), whose sum is σ = 141985254138. Its totient is φ = 40567215464.

The previous prime is 81134430901. The next prime is 81134430941. The reversal of 81134430932 is 23903443118.

It can be written as a sum of positive squares in only one way, i.e., 51676200976 + 29458229956 = 227324^2 + 171634^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10141803863 + ... + 10141803870.

It is an arithmetic number, because the mean of its divisors is an integer number (23664209023).

Almost surely, 2^81134430932 is an apocalyptic number.

It is an amenable number.

81134430932 is a deficient number, since it is larger than the sum of its proper divisors (60850823206).

81134430932 is a wasteful number, since it uses less digits than its factorization.

81134430932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20283607737 (or 20283607735 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 38.

The spelling of 81134430932 in words is "eighty-one billion, one hundred thirty-four million, four hundred thirty thousand, nine hundred thirty-two".