81594389230 has 16 divisors (see below), whose sum is σ = 148729014720. Its totient is φ = 32224619232.

The previous prime is 81594389209. The next prime is 81594389257. The reversal of 81594389230 is 3298349518.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51641229 + ... + 51642808.

It is an arithmetic number, because the mean of its divisors is an integer number (9295563420).

Almost surely, 2^81594389230 is an apocalyptic number.

81594389230 is a deficient number, since it is larger than the sum of its proper divisors (67134625490).

81594389230 is a wasteful number, since it uses less digits than its factorization.

81594389230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103284123.

The product of its (nonzero) digits is 1866240, while the sum is 52.

The spelling of 81594389230 in words is "eighty-one billion, five hundred ninety-four million, three hundred eighty-nine thousand, two hundred thirty".