801405543 has 4 divisors (see below), whose sum is σ = 1068540728. Its totient is φ = 534270360.

The previous prime is 801405529. The next prime is 801405547. The reversal of 801405543 is 345504108.

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

It is not a de Polignac number, because 801405543 - 2²⁵ = 767851111 is a prime.

It is a super-2 number, since 2×801405543² = 1284501688702249698, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 801405543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (801405547) 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, 133567588 + ... + 133567593.

It is an arithmetic number, because the mean of its divisors is an integer number (267135182).

Almost surely, 2^801405543 is an apocalyptic number.

801405543 is a deficient number, since it is larger than the sum of its proper divisors (267135185).

801405543 is a wasteful number, since it uses less digits than its factorization.

801405543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267135184.

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 801405543 is about 28309.1070682210. The cubic root of 801405543 is about 928.8611113652.

The spelling of 801405543 in words is "eight hundred one million, four hundred five thousand, five hundred forty-three".