80537273856 has 360 divisors, whose sum is σ = 258835777200. Its totient is φ = 23964180480.

The previous prime is 80537273827. The next prime is 80537273857. The reversal of 80537273856 is 65837273508.

80537273856 is a `hidden beast` number, since 8 + 0 + 537 + 27 + 3 + 85 + 6 = 666.

It is a super-2 number, since 2×80537273856² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80537273857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 57567045 + ... + 57568443.

It is an arithmetic number, because the mean of its divisors is an integer number (718988270).

Almost surely, 2^80537273856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80537273856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129417888600).

80537273856 is an abundant number, since it is smaller than the sum of its proper divisors (178298503344).

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

80537273856 is a wasteful number, since it uses less digits than its factorization.

80537273856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1498 (or 1448 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 54.

The spelling of 80537273856 in words is "eighty billion, five hundred thirty-seven million, two hundred seventy-three thousand, eight hundred fifty-six".