63905357273 has 2 divisors, whose sum is σ = 63905357274. Its totient is φ = 63905357272.

The previous prime is 63905357177. The next prime is 63905357281. The reversal of 63905357273 is 37275350936.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61438049689 + 2467307584 = 247867^2 + 49672^2 .

It is a cyclic number.

It is not a de Polignac number, because 63905357273 - 2¹² = 63905353177 is a prime.

It is not a weakly prime, because it can be changed into another prime (63905957273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31952678636 + 31952678637.

It is an arithmetic number, because the mean of its divisors is an integer number (31952678637).

Almost surely, 2^63905357273 is an apocalyptic number.

It is an amenable number.

63905357273 is a deficient number, since it is larger than the sum of its proper divisors (1).

63905357273 is an equidigital number, since it uses as much as digits as its factorization.

63905357273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3572100, while the sum is 50.

The spelling of 63905357273 in words is "sixty-three billion, nine hundred five million, three hundred fifty-seven thousand, two hundred seventy-three".