81797411479718 has 16 divisors (see below), whose sum is σ = 133852617282384. Its totient is φ = 37180000584960.

The previous prime is 81797411479699. The next prime is 81797411479741.

81797411479718 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30743555 + ... + 33298062.

It is an arithmetic number, because the mean of its divisors is an integer number (8365788580149).

Almost surely, 2^{81797411479718} is an apocalyptic number.

81797411479718 is a deficient number, since it is larger than the sum of its proper divisors (52055205802666).

81797411479718 is a wasteful number, since it uses less digits than its factorization.

81797411479718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64099687.

The product of its digits is 199148544, while the sum is 74.

The spelling of 81797411479718 in words is "eighty-one trillion, seven hundred ninety-seven billion, four hundred eleven million, four hundred seventy-nine thousand, seven hundred eighteen".