81882075280 has 40 divisors (see below), whose sum is σ = 192155058432. Its totient is φ = 32446725504.

The previous prime is 81882075263. The next prime is 81882075307. The reversal of 81882075280 is 8257028818.

It is a tau number, because it is divible by the number of its divisors (40).

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, 4774272 + ... + 4791391.

Almost surely, 2^81882075280 is an apocalyptic number.

81882075280 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

81882075280 is an abundant number, since it is smaller than the sum of its proper divisors (110272983152).

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

81882075280 is a wasteful number, since it uses less digits than its factorization.

81882075280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9565783 (or 9565777 counting only the distinct ones).

The product of its (nonzero) digits is 573440, while the sum is 49.

The spelling of 81882075280 in words is "eighty-one billion, eight hundred eighty-two million, seventy-five thousand, two hundred eighty".