63729131563 has 2 divisors, whose sum is σ = 63729131564. Its totient is φ = 63729131562.

The previous prime is 63729131551. The next prime is 63729131593. The reversal of 63729131563 is 36513192736.

63729131563 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63729131563 is a prime.

It is a super-2 number, since 2×63729131563² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (63729131503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31864565781 + 31864565782.

It is an arithmetic number, because the mean of its divisors is an integer number (31864565782).

Almost surely, 2^63729131563 is an apocalyptic number.

63729131563 is a deficient number, since it is larger than the sum of its proper divisors (1).

63729131563 is an equidigital number, since it uses as much as digits as its factorization.

63729131563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 612360, while the sum is 46.

The spelling of 63729131563 in words is "sixty-three billion, seven hundred twenty-nine million, one hundred thirty-one thousand, five hundred sixty-three".