63999794435 has 16 divisors (see below), whose sum is σ = 77101930080. Its totient is φ = 50998759680.

The previous prime is 63999794387. The next prime is 63999794437. The reversal of 63999794435 is 53449799936.

It is not a de Polignac number, because 63999794435 - 2¹⁶ = 63999728899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63999794437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1373825 + ... + 1419645.

It is an arithmetic number, because the mean of its divisors is an integer number (4818870630).

Almost surely, 2^63999794435 is an apocalyptic number.

63999794435 is a deficient number, since it is larger than the sum of its proper divisors (13102135645).

63999794435 is a wasteful number, since it uses less digits than its factorization.

63999794435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46918.

The product of its digits is 198404640, while the sum is 68.

The spelling of 63999794435 in words is "sixty-three billion, nine hundred ninety-nine million, seven hundred ninety-four thousand, four hundred thirty-five".