621090650441 has 4 divisors (see below), whose sum is σ = 621258652692. Its totient is φ = 620922648192.

The previous prime is 621090650437. The next prime is 621090650473. The reversal of 621090650441 is 144056090126.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 217584931600 + 403505718841 = 466460^2 + 635221^2 .

It is a cyclic number.

It is not a de Polignac number, because 621090650441 - 2² = 621090650437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 621090650395 and 621090650404.

It is not an unprimeable number, because it can be changed into a prime (621090850441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83995580 + ... + 84002973.

It is an arithmetic number, because the mean of its divisors is an integer number (155314663173).

Almost surely, 2^621090650441 is an apocalyptic number.

It is an amenable number.

621090650441 is a deficient number, since it is larger than the sum of its proper divisors (168002251).

621090650441 is a wasteful number, since it uses less digits than its factorization.

621090650441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168002250.

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 621090650441 in words is "six hundred twenty-one billion, ninety million, six hundred fifty thousand, four hundred forty-one".