6378491963628 has 18 divisors (see below), whose sum is σ = 16123410241484. Its totient is φ = 2126163987864.

The previous prime is 6378491963621. The next prime is 6378491963671. The reversal of 6378491963628 is 8263691948736.

6378491963628 is a `hidden beast` number, since 6 + 3 + 78 + 4 + 9 + 196 + 362 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (6378491963621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 88590166126 + ... + 88590166197.

Almost surely, 2^{6378491963628} is an apocalyptic number.

It is an amenable number.

6378491963628 is an abundant number, since it is smaller than the sum of its proper divisors (9744918277856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6378491963628 is a wasteful number, since it uses less digits than its factorization.

6378491963628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177180332333 (or 177180332328 counting only the distinct ones).

The product of its digits is 564350976, while the sum is 72.

The spelling of 6378491963628 in words is "six trillion, three hundred seventy-eight billion, four hundred ninety-one million, nine hundred sixty-three thousand, six hundred twenty-eight".