621663143601 has 8 divisors (see below), whose sum is σ = 829090039264. Its totient is φ = 414339171840.

The previous prime is 621663143597. The next prime is 621663143617. The reversal of 621663143601 is 106341366126.

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

It is not a de Polignac number, because 621663143601 - 2² = 621663143597 is a prime.

It is a super-2 number, since 2×621663143601² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 621663143601.

It is not an unprimeable number, because it can be changed into a prime (621663143701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25716880 + ... + 25741041.

It is an arithmetic number, because the mean of its divisors is an integer number (103636254908).

Almost surely, 2^621663143601 is an apocalyptic number.

It is an amenable number.

621663143601 is a deficient number, since it is larger than the sum of its proper divisors (207426895663).

621663143601 is a wasteful number, since it uses less digits than its factorization.

621663143601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51461951.

The product of its (nonzero) digits is 93312, while the sum is 39.

The spelling of 621663143601 in words is "six hundred twenty-one billion, six hundred sixty-three million, one hundred forty-three thousand, six hundred one".