81238927024 has 20 divisors (see below), whose sum is σ = 157474418760. Its totient is φ = 40600367360.

The previous prime is 81238927001. The next prime is 81238927051. The reversal of 81238927024 is 42072983218.

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 3 ways as a sum of consecutive naturals, for example, 1158382 + ... + 1226509.

It is an arithmetic number, because the mean of its divisors is an integer number (7873720938).

Almost surely, 2^81238927024 is an apocalyptic number.

It is an amenable number.

81238927024 is a deficient number, since it is larger than the sum of its proper divisors (76235491736).

81238927024 is a wasteful number, since it uses less digits than its factorization.

81238927024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2387028 (or 2387022 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 46.

The spelling of 81238927024 in words is "eighty-one billion, two hundred thirty-eight million, nine hundred twenty-seven thousand, twenty-four".