5646513421 has 2 divisors, whose sum is σ = 5646513422. Its totient is φ = 5646513420.

The previous prime is 5646513407. The next prime is 5646513437. The reversal of 5646513421 is 1243156465.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4203577225 + 1442936196 = 64835^2 + 37986^2 .

It is a cyclic number.

It is not a de Polignac number, because 5646513421 - 2¹¹ = 5646511373 is a prime.

It is a super-2 number, since 2×5646513421² = 63766227627066246482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5646513491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2823256710 + 2823256711.

It is an arithmetic number, because the mean of its divisors is an integer number (2823256711).

Almost surely, 2^5646513421 is an apocalyptic number.

It is an amenable number.

5646513421 is a deficient number, since it is larger than the sum of its proper divisors (1).

5646513421 is an equidigital number, since it uses as much as digits as its factorization.

5646513421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86400, while the sum is 37.

The square root of 5646513421 is about 75143.2859342736. The cubic root of 5646513421 is about 1780.7110550793.

Adding to 5646513421 its reverse (1243156465), we get a palindrome (6889669886).

The spelling of 5646513421 in words is "five billion, six hundred forty-six million, five hundred thirteen thousand, four hundred twenty-one".