3646534421 has 4 divisors (see below), whose sum is σ = 3647467872. Its totient is φ = 3645600972.

The previous prime is 3646534403. The next prime is 3646534439. The reversal of 3646534421 is 1244356463.

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 an interprime number because it is at equal distance from previous prime (3646534403) and next prime (3646534439).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3646534421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3646534481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 460841 + ... + 468686.

It is an arithmetic number, because the mean of its divisors is an integer number (911866968).

Almost surely, 2^3646534421 is an apocalyptic number.

It is an amenable number.

3646534421 is a deficient number, since it is larger than the sum of its proper divisors (933451).

3646534421 is an equidigital number, since it uses as much as digits as its factorization.

3646534421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933450.

The product of its digits is 207360, while the sum is 38.

The square root of 3646534421 is about 60386.5417208172. The cubic root of 3646534421 is about 1539.1942742237.

The spelling of 3646534421 in words is "three billion, six hundred forty-six million, five hundred thirty-four thousand, four hundred twenty-one".