646550112973 has 2 divisors, whose sum is σ = 646550112974. Its totient is φ = 646550112972.

The previous prime is 646550112961. The next prime is 646550113019. The reversal of 646550112973 is 379211055646.

646550112973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 368190463369 + 278359649604 = 606787^2 + 527598^2 .

It is a cyclic number.

It is not a de Polignac number, because 646550112973 - 2³³ = 637960178381 is a prime.

It is a super-3 number, since 3×646550112973³ (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 (646550112473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323275056486 + 323275056487.

It is an arithmetic number, because the mean of its divisors is an integer number (323275056487).

Almost surely, 2^646550112973 is an apocalyptic number.

It is an amenable number.

646550112973 is a deficient number, since it is larger than the sum of its proper divisors (1).

646550112973 is an equidigital number, since it uses as much as digits as its factorization.

646550112973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1360800, while the sum is 49.

The spelling of 646550112973 in words is "six hundred forty-six billion, five hundred fifty million, one hundred twelve thousand, nine hundred seventy-three".