81075875430 has 64 divisors (see below), whose sum is σ = 212372928000. Its totient is φ = 19645355520.

The previous prime is 81075875417. The next prime is 81075875471. The reversal of 81075875430 is 3457857018.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 81075875430.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 644871 + ... + 760269.

It is an arithmetic number, because the mean of its divisors is an integer number (3318327000).

Almost surely, 2^81075875430 is an apocalyptic number.

81075875430 is an abundant number, since it is smaller than the sum of its proper divisors (131297052570).

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

81075875430 is a wasteful number, since it uses less digits than its factorization.

81075875430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117549.

The product of its (nonzero) digits is 940800, while the sum is 48.

The spelling of 81075875430 in words is "eighty-one billion, seventy-five million, eight hundred seventy-five thousand, four hundred thirty".