3646163423521 has 4 divisors (see below), whose sum is σ = 3646172268544. Its totient is φ = 3646154578500.

The previous prime is 3646163423473. The next prime is 3646163423537. The reversal of 3646163423521 is 1253243616463.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3646163423521 - 2¹¹ = 3646163421473 is a prime.

It is a super-2 number, since 2×3646163423521² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3646163423561) 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, 3772305 + ... + 4639246.

It is an arithmetic number, because the mean of its divisors is an integer number (911543067136).

Almost surely, 2^{3646163423521} is an apocalyptic number.

It is an amenable number.

3646163423521 is a deficient number, since it is larger than the sum of its proper divisors (8845023).

3646163423521 is an equidigital number, since it uses as much as digits as its factorization.

3646163423521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8845022.

The product of its digits is 1866240, while the sum is 46.

The spelling of 3646163423521 in words is "three trillion, six hundred forty-six billion, one hundred sixty-three million, four hundred twenty-three thousand, five hundred twenty-one".