81848323814 has 4 divisors (see below), whose sum is σ = 122772485724. Its totient is φ = 40924161906.

The previous prime is 81848323787. The next prime is 81848323819. The reversal of 81848323814 is 41832384818.

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

It is a super-2 number, since 2×81848323814² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81848323819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20462080952 + ... + 20462080955.

It is an arithmetic number, because the mean of its divisors is an integer number (30693121431).

Almost surely, 2^81848323814 is an apocalyptic number.

81848323814 is a deficient number, since it is larger than the sum of its proper divisors (40924161910).

81848323814 is a wasteful number, since it uses less digits than its factorization.

81848323814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40924161909.

The product of its digits is 1179648, while the sum is 50.

The spelling of 81848323814 in words is "eighty-one billion, eight hundred forty-eight million, three hundred twenty-three thousand, eight hundred fourteen".