81747674718 has 96 divisors (see below), whose sum is σ = 170866620288. Its totient is φ = 26069904000.

The previous prime is 81747674683. The next prime is 81747674761.

81747674718 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 47 ways as a sum of consecutive naturals, for example, 175048321 + ... + 175048787.

It is an arithmetic number, because the mean of its divisors is an integer number (1779860628).

Almost surely, 2^81747674718 is an apocalyptic number.

81747674718 is an abundant number, since it is smaller than the sum of its proper divisors (89118945570).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81747674718 is a wasteful number, since it uses less digits than its factorization.

81747674718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858 (or 821 counting only the distinct ones).

The product of its digits is 14751744, while the sum is 60.

The spelling of 81747674718 in words is "eighty-one billion, seven hundred forty-seven million, six hundred seventy-four thousand, seven hundred eighteen".