81102881677 has 8 divisors (see below), whose sum is σ = 81807865920. Its totient is φ = 80399198880.

The previous prime is 81102881653. The next prime is 81102881687. The reversal of 81102881677 is 77618820118.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 81102881677 - 2²⁷ = 80968663949 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 81102881677.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81102881617) 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, 199977 + ... + 449662.

It is an arithmetic number, because the mean of its divisors is an integer number (10225983240).

Almost surely, 2^81102881677 is an apocalyptic number.

It is an amenable number.

81102881677 is a deficient number, since it is larger than the sum of its proper divisors (704984243).

81102881677 is a wasteful number, since it uses less digits than its factorization.

81102881677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650723.

The product of its (nonzero) digits is 301056, while the sum is 49.

The spelling of 81102881677 in words is "eighty-one billion, one hundred two million, eight hundred eighty-one thousand, six hundred seventy-seven".