52855761649 has 2 divisors, whose sum is σ = 52855761650. Its totient is φ = 52855761648.

The previous prime is 52855761641. The next prime is 52855761661. The reversal of 52855761649 is 94616755825.

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., 48341937424 + 4513824225 = 219868^2 + 67185^2 .

It is a cyclic number.

It is not a de Polignac number, because 52855761649 - 2³ = 52855761641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 52855761593 and 52855761602.

It is not a weakly prime, because it can be changed into another prime (52855761641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26427880824 + 26427880825.

It is an arithmetic number, because the mean of its divisors is an integer number (26427880825).

Almost surely, 2^52855761649 is an apocalyptic number.

It is an amenable number.

52855761649 is a deficient number, since it is larger than the sum of its proper divisors (1).

52855761649 is an equidigital number, since it uses as much as digits as its factorization.

52855761649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144000, while the sum is 58.

The spelling of 52855761649 in words is "fifty-two billion, eight hundred fifty-five million, seven hundred sixty-one thousand, six hundred forty-nine".