621445746403 has 2 divisors, whose sum is σ = 621445746404. Its totient is φ = 621445746402.

The previous prime is 621445746391. The next prime is 621445746437. The reversal of 621445746403 is 304647544126.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 621445746403 - 2¹⁷ = 621445615331 is a prime.

It is not a weakly prime, because it can be changed into another prime (621445749403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310722873201 + 310722873202.

It is an arithmetic number, because the mean of its divisors is an integer number (310722873202).

Almost surely, 2^621445746403 is an apocalyptic number.

621445746403 is a deficient number, since it is larger than the sum of its proper divisors (1).

621445746403 is an equidigital number, since it uses as much as digits as its factorization.

621445746403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1935360, while the sum is 46.

The spelling of 621445746403 in words is "six hundred twenty-one billion, four hundred forty-five million, seven hundred forty-six thousand, four hundred three".