621543325603 has 2 divisors, whose sum is σ = 621543325604. Its totient is φ = 621543325602.

The previous prime is 621543325597. The next prime is 621543325639. The reversal of 621543325603 is 306523345126.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-621543325603 is a prime.

It is a super-2 number, since 2×621543325603² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (621543325643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310771662801 + 310771662802.

It is an arithmetic number, because the mean of its divisors is an integer number (310771662802).

Almost surely, 2^621543325603 is an apocalyptic number.

621543325603 is a deficient number, since it is larger than the sum of its proper divisors (1).

621543325603 is an equidigital number, since it uses as much as digits as its factorization.

621543325603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 388800, while the sum is 40.

The spelling of 621543325603 in words is "six hundred twenty-one billion, five hundred forty-three million, three hundred twenty-five thousand, six hundred three".