63778517233 has 16 divisors (see below), whose sum is σ = 67059974080. Its totient is φ = 60580529856.

The previous prime is 63778517227. The next prime is 63778517249. The reversal of 63778517233 is 33271587736.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63778517233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63778517333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3457591 + ... + 3475987.

It is an arithmetic number, because the mean of its divisors is an integer number (4191248380).

Almost surely, 2^63778517233 is an apocalyptic number.

It is an amenable number.

63778517233 is a deficient number, since it is larger than the sum of its proper divisors (3281456847).

63778517233 is a wasteful number, since it uses less digits than its factorization.

63778517233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20656.

The product of its digits is 4445280, while the sum is 52.

The spelling of 63778517233 in words is "sixty-three billion, seven hundred seventy-eight million, five hundred seventeen thousand, two hundred thirty-three".