81794049718 has 16 divisors (see below), whose sum is σ = 124090177536. Its totient is φ = 40433285160.

The previous prime is 81794049709. The next prime is 81794049719.

81794049718 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81794049719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 594546 + ... + 719077.

It is an arithmetic number, because the mean of its divisors is an integer number (7755636096).

Almost surely, 2^81794049718 is an apocalyptic number.

81794049718 is a deficient number, since it is larger than the sum of its proper divisors (42296127818).

81794049718 is a wasteful number, since it uses less digits than its factorization.

81794049718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1313979.

The product of its (nonzero) digits is 4064256, while the sum is 58.

The spelling of 81794049718 in words is "eighty-one billion, seven hundred ninety-four million, forty-nine thousand, seven hundred eighteen".