3405363436721 has 16 divisors (see below), whose sum is σ = 3456897696000. Its totient is φ = 3354245250048.

The previous prime is 3405363436691. The next prime is 3405363436751. The reversal of 3405363436721 is 1276343635043.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3405363436691) and next prime (3405363436751).

It is a cyclic number.

It is not a de Polignac number, because 3405363436721 - 2¹⁴ = 3405363420337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3405363436751) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18776345 + ... + 18956841.

It is an arithmetic number, because the mean of its divisors is an integer number (216056106000).

Almost surely, 2^{3405363436721} is an apocalyptic number.

It is an amenable number.

3405363436721 is a deficient number, since it is larger than the sum of its proper divisors (51534259279).

3405363436721 is a wasteful number, since it uses less digits than its factorization.

3405363436721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181648.

The product of its (nonzero) digits is 3265920, while the sum is 47.

The spelling of 3405363436721 in words is "three trillion, four hundred five billion, three hundred sixty-three million, four hundred thirty-six thousand, seven hundred twenty-one".