80521757 has 8 divisors (see below), whose sum is σ = 82531680. Its totient is φ = 78518160.

The previous prime is 80521747. The next prime is 80521789. The reversal of 80521757 is 75712508.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 80521757 - 2⁸ = 80521501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80521747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33719 + ... + 36027.

It is an arithmetic number, because the mean of its divisors is an integer number (10316460).

Almost surely, 2^80521757 is an apocalyptic number.

It is an amenable number.

80521757 is a deficient number, since it is larger than the sum of its proper divisors (2009923).

80521757 is a wasteful number, since it uses less digits than its factorization.

80521757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3163.

The product of its (nonzero) digits is 19600, while the sum is 35.

The square root of 80521757 is about 8973.3916107568. The cubic root of 80521757 is about 431.8216517032.

Subtracting from 80521757 its reverse (75712508), we obtain a square (4809249 = 2193²).

The spelling of 80521757 in words is "eighty million, five hundred twenty-one thousand, seven hundred fifty-seven".