81942283380 has 24 divisors (see below), whose sum is σ = 229438393632. Its totient is φ = 21851275552.

The previous prime is 81942283373. The next prime is 81942283403. The reversal of 81942283380 is 8338224918.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

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, 682852302 + ... + 682852421.

It is an arithmetic number, because the mean of its divisors is an integer number (9559933068).

Almost surely, 2^81942283380 is an apocalyptic number.

It is an amenable number.

81942283380 is an abundant number, since it is smaller than the sum of its proper divisors (147496110252).

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

81942283380 is a wasteful number, since it uses less digits than its factorization.

81942283380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365704735 (or 1365704733 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 48.

The spelling of 81942283380 in words is "eighty-one billion, nine hundred forty-two million, two hundred eighty-three thousand, three hundred eighty".