454043561620021 has 16 divisors (see below), whose sum is σ = 459110252972800. Its totient is φ = 448994123915328.

The previous prime is 454043561619983. The next prime is 454043561620027. The reversal of 454043561620021 is 120026165340454.

It is a cyclic number.

It is not a de Polignac number, because 454043561620021 - 2³³ = 454034971685429 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 454043561620021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (454043561620027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110900626 + ... + 114921868.

It is an arithmetic number, because the mean of its divisors is an integer number (28694390810800).

Almost surely, 2^{454043561620021} is an apocalyptic number.

It is an amenable number.

454043561620021 is a deficient number, since it is larger than the sum of its proper divisors (5066691352779).

454043561620021 is a wasteful number, since it uses less digits than its factorization.

454043561620021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4023388.

The product of its (nonzero) digits is 691200, while the sum is 43.

The spelling of 454043561620021 in words is "four hundred fifty-four trillion, forty-three billion, five hundred sixty-one million, six hundred twenty thousand, twenty-one".