5646423121 has 4 divisors (see below), whose sum is σ = 5646709044. Its totient is φ = 5646137200.

The previous prime is 5646423113. The next prime is 5646423131. The reversal of 5646423121 is 1213246465.

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 4566380625 + 1080042496 = 67575^2 + 32864^2 .

It is a cyclic number.

It is not a de Polignac number, because 5646423121 - 2³ = 5646423113 is a prime.

It is a super-2 number, since 2×5646423121² = 63764188122726761282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5646423131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110950 + ... + 153631.

It is an arithmetic number, because the mean of its divisors is an integer number (1411677261).

Almost surely, 2^5646423121 is an apocalyptic number.

It is an amenable number.

5646423121 is a deficient number, since it is larger than the sum of its proper divisors (285923).

5646423121 is a wasteful number, since it uses less digits than its factorization.

5646423121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285922.

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

The square root of 5646423121 is about 75142.6850797867. The cubic root of 5646423121 is about 1780.7015625510.

Adding to 5646423121 its reverse (1213246465), we get a palindrome (6859669586).

The spelling of 5646423121 in words is "five billion, six hundred forty-six million, four hundred twenty-three thousand, one hundred twenty-one".