801263805 has 64 divisors (see below), whose sum is σ = 1399120128. Its totient is φ = 390041600.

The previous prime is 801263797. The next prime is 801263809. The reversal of 801263805 is 508362108.

It is a happy number.

It is not a de Polignac number, because 801263805 - 2³ = 801263797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (801263809) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1364722 + ... + 1365308.

It is an arithmetic number, because the mean of its divisors is an integer number (21861252).

Almost surely, 2^801263805 is an apocalyptic number.

801263805 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

801263805 is a deficient number, since it is larger than the sum of its proper divisors (597856323).

801263805 is a wasteful number, since it uses less digits than its factorization.

801263805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 801263805 is about 28306.6035581806. The cubic root of 801263805 is about 928.8063481309.

It can be divided in two parts, 8012 and 63805, that added together give a palindrome (71817).

The spelling of 801263805 in words is "eight hundred one million, two hundred sixty-three thousand, eight hundred five".