6421963454 has 4 divisors (see below), whose sum is σ = 9632945184. Its totient is φ = 3210981726.

The previous prime is 6421963453. The next prime is 6421963511. The reversal of 6421963454 is 4543691246.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×6421963454² = 82483229209023220232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6421963453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1605490862 + ... + 1605490865.

It is an arithmetic number, because the mean of its divisors is an integer number (2408236296).

Almost surely, 2^6421963454 is an apocalyptic number.

6421963454 is a deficient number, since it is larger than the sum of its proper divisors (3210981730).

6421963454 is a wasteful number, since it uses less digits than its factorization.

6421963454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3210981729.

The product of its digits is 622080, while the sum is 44.

The square root of 6421963454 is about 80137.1540173470. The cubic root of 6421963454 is about 1858.7569694110.

The spelling of 6421963454 in words is "six billion, four hundred twenty-one million, nine hundred sixty-three thousand, four hundred fifty-four".