83404723520 has 56 divisors (see below), whose sum is σ = 198638541000. Its totient is φ = 33356675072.

The previous prime is 83404723517. The next prime is 83404723559. The reversal of 83404723520 is 2532740438.

It can be written as a sum of positive squares in 4 ways, for example, as 7608026176 + 75796697344 = 87224^2 + 275312^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2527286 + ... + 2560074.

Almost surely, 2^83404723520 is an apocalyptic number.

83404723520 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

83404723520 is an abundant number, since it is smaller than the sum of its proper divisors (115233817480).

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

83404723520 is a wasteful number, since it uses less digits than its factorization.

83404723520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40755 (or 40745 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 38.

The spelling of 83404723520 in words is "eighty-three billion, four hundred four million, seven hundred twenty-three thousand, five hundred twenty".