3500405344621 has 4 divisors (see below), whose sum is σ = 3504797322012. Its totient is φ = 3496013367232.

The previous prime is 3500405344619. The next prime is 3500405344669. The reversal of 3500405344621 is 1264435040053.

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 2899647037225 + 600758307396 = 1702835^2 + 775086^2 .

It is a cyclic number.

It is not a de Polignac number, because 3500405344621 - 2¹ = 3500405344619 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 (3500405344691) 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, 2195987500 + ... + 2195989093.

It is an arithmetic number, because the mean of its divisors is an integer number (876199330503).

Almost surely, 2^{3500405344621} is an apocalyptic number.

It is an amenable number.

3500405344621 is a deficient number, since it is larger than the sum of its proper divisors (4391977391).

3500405344621 is an equidigital number, since it uses as much as digits as its factorization.

3500405344621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4391977390.

The product of its (nonzero) digits is 172800, while the sum is 37.

The spelling of 3500405344621 in words is "three trillion, five hundred billion, four hundred five million, three hundred forty-four thousand, six hundred twenty-one".