63657823069 has 2 divisors, whose sum is σ = 63657823070. Its totient is φ = 63657823068.

The previous prime is 63657823043. The next prime is 63657823087. The reversal of 63657823069 is 96032875636.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61720942969 + 1936880100 = 248437^2 + 44010^2 .

It is a cyclic number.

It is not a de Polignac number, because 63657823069 - 2²³ = 63649434461 is a prime.

It is a super-2 number, since 2×63657823069² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63657823769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31828911534 + 31828911535.

It is an arithmetic number, because the mean of its divisors is an integer number (31828911535).

Almost surely, 2^63657823069 is an apocalyptic number.

It is an amenable number.

63657823069 is a deficient number, since it is larger than the sum of its proper divisors (1).

63657823069 is an equidigital number, since it uses as much as digits as its factorization.

63657823069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9797760, while the sum is 55.

The spelling of 63657823069 in words is "sixty-three billion, six hundred fifty-seven million, eight hundred twenty-three thousand, sixty-nine".