4065612003421 has 4 divisors (see below), whose sum is σ = 4065759053532. Its totient is φ = 4065464953312.

The previous prime is 4065612003407. The next prime is 4065612003449. The reversal of 4065612003421 is 1243002165604.

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 694205576100 + 3371406427321 = 833190^2 + 1836139^2 .

It is a cyclic number.

It is not a de Polignac number, because 4065612003421 - 2³¹ = 4063464519773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4065612003221) 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, 73483576 + ... + 73538881.

It is an arithmetic number, because the mean of its divisors is an integer number (1016439763383).

Almost surely, 2^{4065612003421} is an apocalyptic number.

It is an amenable number.

4065612003421 is a deficient number, since it is larger than the sum of its proper divisors (147050111).

4065612003421 is a wasteful number, since it uses less digits than its factorization.

4065612003421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147050110.

The product of its (nonzero) digits is 34560, while the sum is 34.

The spelling of 4065612003421 in words is "four trillion, sixty-five billion, six hundred twelve million, three thousand, four hundred twenty-one".