81125364226 has 8 divisors (see below), whose sum is σ = 121695794064. Its totient is φ = 40560099540.

The previous prime is 81125364169. The next prime is 81125364259. The reversal of 81125364226 is 62246352118.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1251780 + ... + 1314991.

It is an arithmetic number, because the mean of its divisors is an integer number (15211974258).

Almost surely, 2^81125364226 is an apocalyptic number.

81125364226 is a deficient number, since it is larger than the sum of its proper divisors (40570429838).

81125364226 is a wasteful number, since it uses less digits than its factorization.

81125364226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2582576.

The product of its digits is 138240, while the sum is 40.

The spelling of 81125364226 in words is "eighty-one billion, one hundred twenty-five million, three hundred sixty-four thousand, two hundred twenty-six".