63806825689 has 2 divisors, whose sum is σ = 63806825690. Its totient is φ = 63806825688.

The previous prime is 63806825683. The next prime is 63806825717. The reversal of 63806825689 is 98652860836.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63764835289 + 41990400 = 252517^2 + 6480^2 .

It is a cyclic number.

It is not a de Polignac number, because 63806825689 - 2⁵ = 63806825657 is a prime.

It is a super-2 number, since 2×63806825689² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (63806825683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31903412844 + 31903412845.

It is an arithmetic number, because the mean of its divisors is an integer number (31903412845).

Almost surely, 2^63806825689 is an apocalyptic number.

It is an amenable number.

63806825689 is a deficient number, since it is larger than the sum of its proper divisors (1).

63806825689 is an equidigital number, since it uses as much as digits as its factorization.

63806825689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29859840, while the sum is 61.

The spelling of 63806825689 in words is "sixty-three billion, eight hundred six million, eight hundred twenty-five thousand, six hundred eighty-nine".