53123449949 has 2 divisors, whose sum is σ = 53123449950. Its totient is φ = 53123449948.

The previous prime is 53123449933. The next prime is 53123450011. The reversal of 53123449949 is 94994432135.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43099836025 + 10023613924 = 207605^2 + 100118^2 .

It is a cyclic number.

It is not a de Polignac number, because 53123449949 - 2⁴ = 53123449933 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53123449949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53123649949) 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, 26561724974 + 26561724975.

It is an arithmetic number, because the mean of its divisors is an integer number (26561724975).

Almost surely, 2^53123449949 is an apocalyptic number.

It is an amenable number.

53123449949 is a deficient number, since it is larger than the sum of its proper divisors (1).

53123449949 is an equidigital number, since it uses as much as digits as its factorization.

53123449949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4199040, while the sum is 53.

The spelling of 53123449949 in words is "fifty-three billion, one hundred twenty-three million, four hundred forty-nine thousand, nine hundred forty-nine".