80681536 has 28 divisors (see below), whose sum is σ = 172419772. Its totient is φ = 37237248.

The previous prime is 80681533. The next prime is 80681537. The reversal of 80681536 is 63518608.

It can be written as a sum of positive squares in 2 ways, for example, as 6031936 + 74649600 = 2456^2 + 8640^2 .

It is a junction number, because it is equal to n+sod(n) for n = 80681495 and 80681504.

It is not an unprimeable number, because it can be changed into a prime (80681533) 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 3 ways as a sum of consecutive naturals, for example, 47655 + ... + 49318.

It is an arithmetic number, because the mean of its divisors is an integer number (6157849).

Almost surely, 2^80681536 is an apocalyptic number.

It is an amenable number.

80681536 is an abundant number, since it is smaller than the sum of its proper divisors (91738236).

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

80681536 is a wasteful number, since it uses less digits than its factorization.

80681536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96998 (or 96988 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 80681536 is about 8982.2901311414. The cubic root of 80681536 is about 432.1070836507.

It can be divided in two parts, 8068 and 1536, that added together give a square (9604 = 98²).

The spelling of 80681536 in words is "eighty million, six hundred eighty-one thousand, five hundred thirty-six".