81075073284 has 48 divisors (see below), whose sum is σ = 210226779840. Its totient is φ = 27020891520.

The previous prime is 81075073283. The next prime is 81075073291. The reversal of 81075073284 is 48237057018.

81075073284 is a `hidden beast` number, since 8 + 107 + 507 + 32 + 8 + 4 = 666.

It is not an unprimeable number, because it can be changed into a prime (81075073283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 697867 + ... + 805709.

It is an arithmetic number, because the mean of its divisors is an integer number (4379724580).

Almost surely, 2^81075073284 is an apocalyptic number.

It is an amenable number.

81075073284 is an abundant number, since it is smaller than the sum of its proper divisors (129151706556).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81075073284 is a wasteful number, since it uses less digits than its factorization.

81075073284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114817 (or 114809 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The spelling of 81075073284 in words is "eighty-one billion, seventy-five million, seventy-three thousand, two hundred eighty-four".