81293240932 has 24 divisors (see below), whose sum is σ = 150038209440. Its totient is φ = 38433395520.

The previous prime is 81293240927. The next prime is 81293241031. The reversal of 81293240932 is 23904239218.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 986938 + ... + 1066129.

It is an arithmetic number, because the mean of its divisors is an integer number (6251592060).

Almost surely, 2^81293240932 is an apocalyptic number.

It is an amenable number.

81293240932 is a deficient number, since it is larger than the sum of its proper divisors (68744968508).

81293240932 is a wasteful number, since it uses less digits than its factorization.

81293240932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2053611 (or 2053609 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 43.

The spelling of 81293240932 in words is "eighty-one billion, two hundred ninety-three million, two hundred forty thousand, nine hundred thirty-two".