63552900319681 has 2 divisors, whose sum is σ = 63552900319682. Its totient is φ = 63552900319680.

The previous prime is 63552900319673. The next prime is 63552900319717. The reversal of 63552900319681 is 18691300925536.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58312390425025 + 5240509894656 = 7636255^2 + 2289216^2 .

It is a cyclic number.

It is not a de Polignac number, because 63552900319681 - 2³ = 63552900319673 is a prime.

It is a super-2 number, since 2×63552900319681² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (63552900319631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31776450159840 + 31776450159841.

It is an arithmetic number, because the mean of its divisors is an integer number (31776450159841).

Almost surely, 2^{63552900319681} is an apocalyptic number.

It is an amenable number.

63552900319681 is a deficient number, since it is larger than the sum of its proper divisors (1).

63552900319681 is an equidigital number, since it uses as much as digits as its factorization.

63552900319681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10497600, while the sum is 58.

The spelling of 63552900319681 in words is "sixty-three trillion, five hundred fifty-two billion, nine hundred million, three hundred nineteen thousand, six hundred eighty-one".