81675107680 has 48 divisors (see below), whose sum is σ = 193218827760. Its totient is φ = 32625787392.

The previous prime is 81675107669. The next prime is 81675107707. The reversal of 81675107680 is 8670157618.

It is a super-3 number, since 3×81675107680³ (a number of 34 digits) contains 333 as substring.

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, 227139 + ... + 463618.

It is an arithmetic number, because the mean of its divisors is an integer number (4025392245).

Almost surely, 2^81675107680 is an apocalyptic number.

81675107680 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

81675107680 is an abundant number, since it is smaller than the sum of its proper divisors (111543720080).

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

81675107680 is a wasteful number, since it uses less digits than its factorization.

81675107680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691511 (or 691503 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 49.

The spelling of 81675107680 in words is "eighty-one billion, six hundred seventy-five million, one hundred seven thousand, six hundred eighty".