81648272676 has 24 divisors (see below), whose sum is σ = 190781362240. Its totient is φ = 27177701472.

The previous prime is 81648272659. The next prime is 81648272687. The reversal of 81648272676 is 67627284618.

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, 4789816 + ... + 4806831.

Almost surely, 2^81648272676 is an apocalyptic number.

It is an amenable number.

81648272676 is an abundant number, since it is smaller than the sum of its proper divisors (109133089564).

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

81648272676 is a wasteful number, since it uses less digits than its factorization.

81648272676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9597363 (or 9597361 counting only the distinct ones).

The product of its digits is 10838016, while the sum is 57.

The spelling of 81648272676 in words is "eighty-one billion, six hundred forty-eight million, two hundred seventy-two thousand, six hundred seventy-six".