646550092553 has 2 divisors, whose sum is σ = 646550092554. Its totient is φ = 646550092552.

The previous prime is 646550092543. The next prime is 646550092561. The reversal of 646550092553 is 355290055646.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 520803258889 + 125746833664 = 721667^2 + 354608^2 .

It is a cyclic number.

It is not a de Polignac number, because 646550092553 - 2⁴ = 646550092537 is a prime.

It is not a weakly prime, because it can be changed into another prime (646550092543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323275046276 + 323275046277.

It is an arithmetic number, because the mean of its divisors is an integer number (323275046277).

Almost surely, 2^646550092553 is an apocalyptic number.

It is an amenable number.

646550092553 is a deficient number, since it is larger than the sum of its proper divisors (1).

646550092553 is an equidigital number, since it uses as much as digits as its factorization.

646550092553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860000, while the sum is 50.

The spelling of 646550092553 in words is "six hundred forty-six billion, five hundred fifty million, ninety-two thousand, five hundred fifty-three".