63684399767 has 12 divisors (see below), whose sum is σ = 65166207600. Its totient is φ = 62231238720.

The previous prime is 63684399761. The next prime is 63684399799. The reversal of 63684399767 is 76799348636.

It is not a de Polignac number, because 63684399767 - 2⁸ = 63684399511 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63684399697 and 63684399706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63684399761) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 513734 + ... + 625532.

It is an arithmetic number, because the mean of its divisors is an integer number (5430517300).

Almost surely, 2^63684399767 is an apocalyptic number.

63684399767 is a deficient number, since it is larger than the sum of its proper divisors (1481807833).

63684399767 is a wasteful number, since it uses less digits than its factorization.

63684399767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112054 (or 111983 counting only the distinct ones).

The product of its digits is 246903552, while the sum is 68.

The spelling of 63684399767 in words is "sixty-three billion, six hundred eighty-four million, three hundred ninety-nine thousand, seven hundred sixty-seven".