621541662445 has 16 divisors (see below), whose sum is σ = 815079545280. Its totient is φ = 451238630400.

The previous prime is 621541662367. The next prime is 621541662461. The reversal of 621541662445 is 544266145126.

It is not a de Polignac number, because 621541662445 - 2³³ = 612951727853 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 621541662395 and 621541662404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9864180 + ... + 9926989.

It is an arithmetic number, because the mean of its divisors is an integer number (50942471580).

Almost surely, 2^621541662445 is an apocalyptic number.

It is an amenable number.

621541662445 is a deficient number, since it is larger than the sum of its proper divisors (193537882835).

621541662445 is a wasteful number, since it uses less digits than its factorization.

621541662445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19791756.

The product of its digits is 1382400, while the sum is 46.

The spelling of 621541662445 in words is "six hundred twenty-one billion, five hundred forty-one million, six hundred sixty-two thousand, four hundred forty-five".