453784705921 has 4 divisors (see below), whose sum is σ = 463439699712. Its totient is φ = 444129712132.

The previous prime is 453784705903. The next prime is 453784705961. The reversal of 453784705921 is 129507487354.

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 453784705921 - 2¹⁷ = 453784574849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (453784705961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4827496825 + ... + 4827496918.

It is an arithmetic number, because the mean of its divisors is an integer number (115859924928).

Almost surely, 2^453784705921 is an apocalyptic number.

It is an amenable number.

453784705921 is a deficient number, since it is larger than the sum of its proper divisors (9654993791).

453784705921 is an equidigital number, since it uses as much as digits as its factorization.

453784705921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9654993790.

The product of its (nonzero) digits is 8467200, while the sum is 55.

The spelling of 453784705921 in words is "four hundred fifty-three billion, seven hundred eighty-four million, seven hundred five thousand, nine hundred twenty-one".