63657823109 has 2 divisors, whose sum is σ = 63657823110. Its totient is φ = 63657823108.

The previous prime is 63657823087. The next prime is 63657823147. The reversal of 63657823109 is 90132875636.

63657823109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63650244100 + 7579009 = 252290^2 + 2753^2 .

It is a cyclic number.

It is not a de Polignac number, because 63657823109 - 2¹⁶ = 63657757573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63657823609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31828911554 + 31828911555.

It is an arithmetic number, because the mean of its divisors is an integer number (31828911555).

Almost surely, 2^63657823109 is an apocalyptic number.

It is an amenable number.

63657823109 is a deficient number, since it is larger than the sum of its proper divisors (1).

63657823109 is an equidigital number, since it uses as much as digits as its factorization.

63657823109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1632960, while the sum is 50.

The spelling of 63657823109 in words is "sixty-three billion, six hundred fifty-seven million, eight hundred twenty-three thousand, one hundred nine".