71805056 has 16 divisors (see below), whose sum is σ = 143049390. Its totient is φ = 35902464.

The previous prime is 71805023. The next prime is 71805061. The reversal of 71805056 is 65050817.

It can be written as a sum of positive squares in only one way, i.e., 69889600 + 1915456 = 8360^2 + 1384^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280361 + ... + 280616.

Almost surely, 2^71805056 is an apocalyptic number.

It is an amenable number.

71805056 is a deficient number, since it is larger than the sum of its proper divisors (71244334).

71805056 is an equidigital number, since it uses as much as digits as its factorization.

71805056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560991 (or 560979 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 71805056 is about 8473.7864027836. The cubic root of 71805056 is about 415.6409624035.

The spelling of 71805056 in words is "seventy-one million, eight hundred five thousand, fifty-six".