621050550605 has 8 divisors (see below), whose sum is σ = 763437750264. Its totient is φ = 484722380800.

The previous prime is 621050550569. The next prime is 621050550611. The reversal of 621050550605 is 506055050126.

It can be written as a sum of positive squares in 4 ways, for example, as 61685669956 + 559364880649 = 248366^2 + 747907^2 .

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

It is not a de Polignac number, because 621050550605 - 2⁶ = 621050550541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1514757236 + ... + 1514757645.

It is an arithmetic number, because the mean of its divisors is an integer number (95429718783).

Almost surely, 2^621050550605 is an apocalyptic number.

It is an amenable number.

621050550605 is a deficient number, since it is larger than the sum of its proper divisors (142387199659).

621050550605 is a wasteful number, since it uses less digits than its factorization.

621050550605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3029514927.

The product of its (nonzero) digits is 45000, while the sum is 35.

The spelling of 621050550605 in words is "six hundred twenty-one billion, fifty million, five hundred fifty thousand, six hundred five".