3438421072805 has 32 divisors (see below), whose sum is σ = 4356652335840. Its totient is φ = 2601686753280.

The previous prime is 3438421072789. The next prime is 3438421072859. The reversal of 3438421072805 is 5082701248343.

It is a Cunningham number, because it is equal to 1854298²+1.

It can be written as a sum of positive squares in 16 ways, for example, as 787929623716 + 2650491449089 = 887654^2 + 1628033^2 .

It is not a de Polignac number, because 3438421072805 - 2⁴ = 3438421072789 is a prime.

It is a super-2 number, since 2×3438421072805² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3438421072805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1282781 + ... + 2919309.

It is an arithmetic number, because the mean of its divisors is an integer number (136145385495).

Almost surely, 2^{3438421072805} is an apocalyptic number.

It is an amenable number.

3438421072805 is a deficient number, since it is larger than the sum of its proper divisors (918231263035).

3438421072805 is a wasteful number, since it uses less digits than its factorization.

3438421072805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1636889.

The product of its (nonzero) digits is 1290240, while the sum is 47.

The spelling of 3438421072805 in words is "three trillion, four hundred thirty-eight billion, four hundred twenty-one million, seventy-two thousand, eight hundred five".