82961889140 has 48 divisors (see below), whose sum is σ = 192692376912. Its totient is φ = 29804184576.

The previous prime is 82961889133. The next prime is 82961889181. The reversal of 82961889140 is 4198816928.

It can be written as a sum of positive squares in 8 ways, for example, as 434388964 + 82527500176 = 20842^2 + 287276^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4302329 + ... + 4321568.

It is an arithmetic number, because the mean of its divisors is an integer number (4014424519).

Almost surely, 2^82961889140 is an apocalyptic number.

It is an amenable number.

82961889140 is an abundant number, since it is smaller than the sum of its proper divisors (109730487772).

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

82961889140 is a wasteful number, since it uses less digits than its factorization.

82961889140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8623956 (or 8623954 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 56.

The spelling of 82961889140 in words is "eighty-two billion, nine hundred sixty-one million, eight hundred eighty-nine thousand, one hundred forty".