63146750705981 has 2 divisors, whose sum is σ = 63146750705982. Its totient is φ = 63146750705980.

The previous prime is 63146750705977. The next prime is 63146750706163. The reversal of 63146750705981 is 18950705764136.

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., 55879601770756 + 7267148935225 = 7475266^2 + 2695765^2 .

It is a cyclic number.

It is not a de Polignac number, because 63146750705981 - 2² = 63146750705977 is a prime.

It is a super-2 number, since 2×63146750705981² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63146750705881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31573375352990 + 31573375352991.

It is an arithmetic number, because the mean of its divisors is an integer number (31573375352991).

Almost surely, 2^{63146750705981} is an apocalyptic number.

It is an amenable number.

63146750705981 is a deficient number, since it is larger than the sum of its proper divisors (1).

63146750705981 is an equidigital number, since it uses as much as digits as its factorization.

63146750705981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38102400, while the sum is 62.

The spelling of 63146750705981 in words is "sixty-three trillion, one hundred forty-six billion, seven hundred fifty million, seven hundred five thousand, nine hundred eighty-one".