6928544405 has 4 divisors (see below), whose sum is σ = 8314253292. Its totient is φ = 5542835520.

The previous prime is 6928544401. The next prime is 6928544407. The reversal of 6928544405 is 5044458296.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4029583441 + 2898960964 = 63479^2 + 53842^2 .

It is not a de Polignac number, because 6928544405 - 2² = 6928544401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6928544405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6928544401) 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, 692854436 + ... + 692854445.

It is an arithmetic number, because the mean of its divisors is an integer number (2078563323).

Almost surely, 2^6928544405 is an apocalyptic number.

It is an amenable number.

6928544405 is a deficient number, since it is larger than the sum of its proper divisors (1385708887).

6928544405 is a wasteful number, since it uses less digits than its factorization.

6928544405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385708886.

The product of its (nonzero) digits is 1382400, while the sum is 47.

The square root of 6928544405 is about 83237.8784268316. The cubic root of 6928544405 is about 1906.3998780947.

The spelling of 6928544405 in words is "six billion, nine hundred twenty-eight million, five hundred forty-four thousand, four hundred five".