63470318621 has 2 divisors, whose sum is σ = 63470318622. Its totient is φ = 63470318620.

The previous prime is 63470318599. The next prime is 63470318687. The reversal of 63470318621 is 12681307436.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47268847396 + 16201471225 = 217414^2 + 127285^2 .

It is a cyclic number.

It is not a de Polignac number, because 63470318621 - 2¹⁰ = 63470317597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63470318921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31735159310 + 31735159311.

It is an arithmetic number, because the mean of its divisors is an integer number (31735159311).

Almost surely, 2^63470318621 is an apocalyptic number.

It is an amenable number.

63470318621 is a deficient number, since it is larger than the sum of its proper divisors (1).

63470318621 is an equidigital number, since it uses as much as digits as its factorization.

63470318621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 41.

The spelling of 63470318621 in words is "sixty-three billion, four hundred seventy million, three hundred eighteen thousand, six hundred twenty-one".