621146817803 has 2 divisors, whose sum is σ = 621146817804. Its totient is φ = 621146817802.

The previous prime is 621146817773. The next prime is 621146817869. The reversal of 621146817803 is 308718641126.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 621146817803 - 2²⁰ = 621145769227 is a prime.

It is not a weakly prime, because it can be changed into another prime (621146816803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310573408901 + 310573408902.

It is an arithmetic number, because the mean of its divisors is an integer number (310573408902).

Almost surely, 2^621146817803 is an apocalyptic number.

621146817803 is a deficient number, since it is larger than the sum of its proper divisors (1).

621146817803 is an equidigital number, since it uses as much as digits as its factorization.

621146817803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 387072, while the sum is 47.

The spelling of 621146817803 in words is "six hundred twenty-one billion, one hundred forty-six million, eight hundred seventeen thousand, eight hundred three".