805257755 has 8 divisors (see below), whose sum is σ = 966562512. Its totient is φ = 644037408.

The previous prime is 805257727. The next prime is 805257781. The reversal of 805257755 is 557752508.

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 805257755 - 2²² = 801063451 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2237 + ... + 40193.

It is an arithmetic number, because the mean of its divisors is an integer number (120820314).

Almost surely, 2^805257755 is an apocalyptic number.

805257755 is a deficient number, since it is larger than the sum of its proper divisors (161304757).

805257755 is a wasteful number, since it uses less digits than its factorization.

805257755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42205.

The product of its (nonzero) digits is 490000, while the sum is 44.

The square root of 805257755 is about 28377.0638896980. The cubic root of 805257755 is about 930.3470223817.

The spelling of 805257755 in words is "eight hundred five million, two hundred fifty-seven thousand, seven hundred fifty-five".