63646138051 has 2 divisors, whose sum is σ = 63646138052. Its totient is φ = 63646138050.

The previous prime is 63646138013. The next prime is 63646138069. The reversal of 63646138051 is 15083164636.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63646138051 - 2¹¹ = 63646136003 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 63646137989 and 63646138007.

It is not a weakly prime, because it can be changed into another prime (63646138001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31823069025 + 31823069026.

It is an arithmetic number, because the mean of its divisors is an integer number (31823069026).

Almost surely, 2^63646138051 is an apocalyptic number.

63646138051 is a deficient number, since it is larger than the sum of its proper divisors (1).

63646138051 is an equidigital number, since it uses as much as digits as its factorization.

63646138051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 63646138051 in words is "sixty-three billion, six hundred forty-six million, one hundred thirty-eight thousand, fifty-one".