6420887922964 has 24 divisors (see below), whose sum is σ = 11379024151040. Its totient is φ = 3169739847456.

The previous prime is 6420887922961. The next prime is 6420887922983. The reversal of 6420887922964 is 4692297880246.

It is a self number, because there is not a number n which added to its sum of digits gives 6420887922964.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6420887922961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17424229 + ... + 17788915.

Almost surely, 2^{6420887922964} is an apocalyptic number.

It is an amenable number.

6420887922964 is a deficient number, since it is larger than the sum of its proper divisors (4958136228076).

6420887922964 is a wasteful number, since it uses less digits than its factorization.

6420887922964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420487 (or 420485 counting only the distinct ones).

The product of its (nonzero) digits is 167215104, while the sum is 67.

The spelling of 6420887922964 in words is "six trillion, four hundred twenty billion, eight hundred eighty-seven million, nine hundred twenty-two thousand, nine hundred sixty-four".