80816525 has 6 divisors (see below), whose sum is σ = 100212522. Its totient is φ = 64653200.

The previous prime is 80816509. The next prime is 80816551. The reversal of 80816525 is 52561808.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 22033636 + 58782889 = 4694^2 + 7667^2 .

It is not a de Polignac number, because 80816525 - 2⁴ = 80816509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1616306 + ... + 1616355.

It is an arithmetic number, because the mean of its divisors is an integer number (16702087).

Almost surely, 2^80816525 is an apocalyptic number.

It is an amenable number.

80816525 is a deficient number, since it is larger than the sum of its proper divisors (19395997).

80816525 is a wasteful number, since it uses less digits than its factorization.

80816525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3232671 (or 3232666 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 80816525 is about 8989.8011657656. The cubic root of 80816525 is about 432.3479367857.

The spelling of 80816525 in words is "eighty million, eight hundred sixteen thousand, five hundred twenty-five".