63846074221 has 2 divisors, whose sum is σ = 63846074222. Its totient is φ = 63846074220.

The previous prime is 63846074207. The next prime is 63846074251. The reversal of 63846074221 is 12247064836.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44410926121 + 19435148100 = 210739^2 + 139410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63846074221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63846074251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31923037110 + 31923037111.

It is an arithmetic number, because the mean of its divisors is an integer number (31923037111).

Almost surely, 2^63846074221 is an apocalyptic number.

It is an amenable number.

63846074221 is a deficient number, since it is larger than the sum of its proper divisors (1).

63846074221 is an equidigital number, since it uses as much as digits as its factorization.

63846074221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 387072, while the sum is 43.

The spelling of 63846074221 in words is "sixty-three billion, eight hundred forty-six million, seventy-four thousand, two hundred twenty-one".