621630566005 has 8 divisors (see below), whose sum is σ = 746002538424. Its totient is φ = 497273880000.

The previous prime is 621630565967. The next prime is 621630566021. The reversal of 621630566005 is 500665036126.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 190871998321 + 430758567684 = 436889^2 + 656322^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-621630566005 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3731946 + ... + 3894955.

It is an arithmetic number, because the mean of its divisors is an integer number (93250317303).

Almost surely, 2^621630566005 is an apocalyptic number.

It is an amenable number.

621630566005 is a deficient number, since it is larger than the sum of its proper divisors (124371972419).

621630566005 is a wasteful number, since it uses less digits than its factorization.

621630566005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7643207.

The product of its (nonzero) digits is 194400, while the sum is 40.

The spelling of 621630566005 in words is "six hundred twenty-one billion, six hundred thirty million, five hundred sixty-six thousand, five".