80853581 has 4 divisors (see below), whose sum is σ = 85609692. Its totient is φ = 76097472.

The previous prime is 80853571. The next prime is 80853601. The reversal of 80853581 is 18535808.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42784681 + 38068900 = 6541^2 + 6170^2 .

It is a cyclic number.

It is not a de Polignac number, because 80853581 - 2²² = 76659277 is a prime.

It is a super-2 number, since 2×80853581² = 13074603121047122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80853511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2378030 + ... + 2378063.

It is an arithmetic number, because the mean of its divisors is an integer number (21402423).

Almost surely, 2^80853581 is an apocalyptic number.

It is an amenable number.

80853581 is a deficient number, since it is larger than the sum of its proper divisors (4756111).

80853581 is a wasteful number, since it uses less digits than its factorization.

80853581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4756110.

The product of its (nonzero) digits is 38400, while the sum is 38.

The square root of 80853581 is about 8991.8619317692. The cubic root of 80853581 is about 432.4140067597.

The spelling of 80853581 in words is "eighty million, eight hundred fifty-three thousand, five hundred eighty-one".