81485593826 has 32 divisors (see below), whose sum is σ = 150499187328. Its totient is φ = 32222292480.

The previous prime is 81485593811. The next prime is 81485593829. The reversal of 81485593826 is 62839558418.

It is not an unprimeable number, because it can be changed into a prime (81485593829) 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, 337106 + ... + 525938.

It is an arithmetic number, because the mean of its divisors is an integer number (4703099604).

Almost surely, 2^81485593826 is an apocalyptic number.

81485593826 is a deficient number, since it is larger than the sum of its proper divisors (69013593502).

81485593826 is a wasteful number, since it uses less digits than its factorization.

81485593826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191226.

The product of its digits is 16588800, while the sum is 59.

The spelling of 81485593826 in words is "eighty-one billion, four hundred eighty-five million, five hundred ninety-three thousand, eight hundred twenty-six".