405443021661553 has 8 divisors (see below), whose sum is σ = 405507273799680. Its totient is φ = 405378774033840.

The previous prime is 405443021661529. The next prime is 405443021661589. The reversal of 405443021661553 is 355166120344504.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-405443021661553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 405443021661497 and 405443021661506.

It is not an unprimeable number, because it can be changed into a prime (405443021661053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180991248 + ... + 183217678.

It is an arithmetic number, because the mean of its divisors is an integer number (50688409224960).

Almost surely, 2^{405443021661553} is an apocalyptic number.

It is an amenable number.

405443021661553 is a deficient number, since it is larger than the sum of its proper divisors (64252138127).

405443021661553 is a wasteful number, since it uses less digits than its factorization.

405443021661553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2255207.

The product of its (nonzero) digits is 5184000, while the sum is 49.

The spelling of 405443021661553 in words is "four hundred five trillion, four hundred forty-three billion, twenty-one million, six hundred sixty-one thousand, five hundred fifty-three".