205124414621 has 8 divisors (see below), whose sum is σ = 234576381120. Its totient is φ = 175709567808.

The previous prime is 205124414591. The next prime is 205124414681. The reversal of 205124414621 is 126414421502.

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 205124414621 - 2⁶ = 205124414557 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 (205124414681) 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, 9268076 + ... + 9290181.

It is an arithmetic number, because the mean of its divisors is an integer number (29322047640).

Almost surely, 2^205124414621 is an apocalyptic number.

It is an amenable number.

205124414621 is a deficient number, since it is larger than the sum of its proper divisors (29451966499).

205124414621 is a wasteful number, since it uses less digits than its factorization.

205124414621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18559843.

The product of its (nonzero) digits is 15360, while the sum is 32.

The spelling of 205124414621 in words is "two hundred five billion, one hundred twenty-four million, four hundred fourteen thousand, six hundred twenty-one".