646623114461 has 2 divisors, whose sum is σ = 646623114462. Its totient is φ = 646623114460.

The previous prime is 646623114437. The next prime is 646623114491. The reversal of 646623114461 is 164411326646.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 490119007225 + 156504107236 = 700085^2 + 395606^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-646623114461 is a prime.

It is a super-3 number, since 3×646623114461³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (646623114491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323311557230 + 323311557231.

It is an arithmetic number, because the mean of its divisors is an integer number (323311557231).

Almost surely, 2^646623114461 is an apocalyptic number.

It is an amenable number.

646623114461 is a deficient number, since it is larger than the sum of its proper divisors (1).

646623114461 is an equidigital number, since it uses as much as digits as its factorization.

646623114461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 497664, while the sum is 44.

The spelling of 646623114461 in words is "six hundred forty-six billion, six hundred twenty-three million, one hundred fourteen thousand, four hundred sixty-one".