2421453521999 has 4 divisors (see below), whose sum is σ = 2526734109936. Its totient is φ = 2316172934064.

The previous prime is 2421453521957. The next prime is 2421453522011. The reversal of 2421453521999 is 9991253541242.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2421453521999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2421453521299) by changing a digit.

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, 52640293934 + ... + 52640293979.

It is an arithmetic number, because the mean of its divisors is an integer number (631683527484).

Almost surely, 2^{2421453521999} is an apocalyptic number.

2421453521999 is a deficient number, since it is larger than the sum of its proper divisors (105280587937).

2421453521999 is a wasteful number, since it uses less digits than its factorization.

2421453521999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105280587936.

The product of its digits is 6998400, while the sum is 56.

The spelling of 2421453521999 in words is "two trillion, four hundred twenty-one billion, four hundred fifty-three million, five hundred twenty-one thousand, nine hundred ninety-nine".