81051680674 has 16 divisors (see below), whose sum is σ = 129296240928. Its totient is φ = 37973937472.

The previous prime is 81051680597. The next prime is 81051680681. The reversal of 81051680674 is 47608615018.

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, 5243104 + ... + 5258539.

It is an arithmetic number, because the mean of its divisors is an integer number (8081015058).

Almost surely, 2^81051680674 is an apocalyptic number.

81051680674 is a deficient number, since it is larger than the sum of its proper divisors (48244560254).

81051680674 is a wasteful number, since it uses less digits than its factorization.

81051680674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10501889.

The product of its (nonzero) digits is 322560, while the sum is 46.

The spelling of 81051680674 in words is "eighty-one billion, fifty-one million, six hundred eighty thousand, six hundred seventy-four".