63621104689 has 2 divisors, whose sum is σ = 63621104690. Its totient is φ = 63621104688.

The previous prime is 63621104621. The next prime is 63621104717. The reversal of 63621104689 is 98640112636.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48304567089 + 15316537600 = 219783^2 + 123760^2 .

It is a cyclic number.

It is not a de Polignac number, because 63621104689 - 2²⁷ = 63486886961 is a prime.

It is not a weakly prime, because it can be changed into another prime (63621102689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31810552344 + 31810552345.

It is an arithmetic number, because the mean of its divisors is an integer number (31810552345).

Almost surely, 2^63621104689 is an apocalyptic number.

It is an amenable number.

63621104689 is a deficient number, since it is larger than the sum of its proper divisors (1).

63621104689 is an equidigital number, since it uses as much as digits as its factorization.

63621104689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 46.

The spelling of 63621104689 in words is "sixty-three billion, six hundred twenty-one million, one hundred four thousand, six hundred eighty-nine".