63978297634 has 8 divisors (see below), whose sum is σ = 97594013520. Its totient is φ = 31446959796.

The previous prime is 63978297563. The next prime is 63978297671. The reversal of 63978297634 is 43679287936.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271094364 + ... + 271094599.

It is an arithmetic number, because the mean of its divisors is an integer number (12199251690).

Almost surely, 2^63978297634 is an apocalyptic number.

63978297634 is a deficient number, since it is larger than the sum of its proper divisors (33615715886).

63978297634 is a wasteful number, since it uses less digits than its factorization.

63978297634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542189024.

The product of its digits is 82301184, while the sum is 64.

The spelling of 63978297634 in words is "sixty-three billion, nine hundred seventy-eight million, two hundred ninety-seven thousand, six hundred thirty-four".