81480853 has 4 divisors (see below), whose sum is σ = 81499360. Its totient is φ = 81462348.

The previous prime is 81480793. The next prime is 81480857. The reversal of 81480853 is 35808418.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 81480853 - 2²⁵ = 47926421 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 (81480857) 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, 1576 + ... + 12862.

It is an arithmetic number, because the mean of its divisors is an integer number (20374840).

Almost surely, 2^81480853 is an apocalyptic number.

It is an amenable number.

81480853 is a deficient number, since it is larger than the sum of its proper divisors (18507).

81480853 is a wasteful number, since it uses less digits than its factorization.

81480853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18506.

The product of its (nonzero) digits is 30720, while the sum is 37.

The square root of 81480853 is about 9026.6745260921. The cubic root of 81480853 is about 433.5293676478.

The spelling of 81480853 in words is "eighty-one million, four hundred eighty thousand, eight hundred fifty-three".