6419312999921 has 4 divisors (see below), whose sum is σ = 6420337964352. Its totient is φ = 6418288035492.

The previous prime is 6419312999861. The next prime is 6419312999933. The reversal of 6419312999921 is 1299992139146.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6419312999921 - 2⁶ = 6419312999857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6419312999321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 512472821 + ... + 512485346.

It is an arithmetic number, because the mean of its divisors is an integer number (1605084491088).

Almost surely, 2^{6419312999921} is an apocalyptic number.

It is an amenable number.

6419312999921 is a deficient number, since it is larger than the sum of its proper divisors (1024964431).

6419312999921 is a wasteful number, since it uses less digits than its factorization.

6419312999921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024964430.

The product of its digits is 17006112, while the sum is 65.

The spelling of 6419312999921 in words is "six trillion, four hundred nineteen billion, three hundred twelve million, nine hundred ninety-nine thousand, nine hundred twenty-one".