205421400541 has 8 divisors (see below), whose sum is σ = 235057515840. Its totient is φ = 175857835488.

The previous prime is 205421400529. The next prime is 205421400557. The reversal of 205421400541 is 145004124502.

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

It is a cyclic number.

It is not a de Polignac number, because 205421400541 - 2²⁷ = 205287182813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205421400241) 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, 18131491 + ... + 18142816.

It is an arithmetic number, because the mean of its divisors is an integer number (29382189480).

Almost surely, 2^205421400541 is an apocalyptic number.

It is an amenable number.

205421400541 is a deficient number, since it is larger than the sum of its proper divisors (29636115299).

205421400541 is an equidigital number, since it uses as much as digits as its factorization.

205421400541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36275123.

The product of its (nonzero) digits is 6400, while the sum is 28.

The spelling of 205421400541 in words is "two hundred five billion, four hundred twenty-one million, four hundred thousand, five hundred forty-one".