63423767978 has 8 divisors (see below), whose sum is σ = 98416191780. Its totient is φ = 30618370720.

The previous prime is 63423767963. The next prime is 63423768047. The reversal of 63423767978 is 87976732436.

It can be written as a sum of positive squares in 2 ways, for example, as 60817971769 + 2605796209 = 246613^2 + 51047^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 63423767978.

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, 546756563 + ... + 546756678.

Almost surely, 2^63423767978 is an apocalyptic number.

63423767978 is a deficient number, since it is larger than the sum of its proper divisors (34992423802).

63423767978 is a wasteful number, since it uses less digits than its factorization.

63423767978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093513272.

The product of its digits is 64012032, while the sum is 62.

The spelling of 63423767978 in words is "sixty-three billion, four hundred twenty-three million, seven hundred sixty-seven thousand, nine hundred seventy-eight".