81103371233858 has 4 divisors (see below), whose sum is σ = 121655056850790. Its totient is φ = 40551685616928.

The previous prime is 81103371233827. The next prime is 81103371233881. The reversal of 81103371233858 is 85833217330118.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 77830807019329 + 3272564214529 = 8822177^2 + 1809023^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20275842808463 + ... + 20275842808466.

Almost surely, 2^{81103371233858} is an apocalyptic number.

81103371233858 is a deficient number, since it is larger than the sum of its proper divisors (40551685616932).

81103371233858 is a wasteful number, since it uses less digits than its factorization.

81103371233858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40551685616931.

The product of its (nonzero) digits is 2903040, while the sum is 53.

The spelling of 81103371233858 in words is "eighty-one trillion, one hundred three billion, three hundred seventy-one million, two hundred thirty-three thousand, eight hundred fifty-eight".