63878487836 has 24 divisors (see below), whose sum is σ = 118436937696. Its totient is φ = 30041707520.

The previous prime is 63878487773. The next prime is 63878487931.

63878487836 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×63878487836² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (68).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 183005 + ... + 401556.

It is an arithmetic number, because the mean of its divisors is an integer number (4934872404).

Almost surely, 2^63878487836 is an apocalyptic number.

It is an amenable number.

63878487836 is a deficient number, since it is larger than the sum of its proper divisors (54558449860).

63878487836 is a wasteful number, since it uses less digits than its factorization.

63878487836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586189 (or 586187 counting only the distinct ones).

The product of its digits is 260112384, while the sum is 68.

The spelling of 63878487836 in words is "sixty-three billion, eight hundred seventy-eight million, four hundred eighty-seven thousand, eight hundred thirty-six".