621632340163 has 2 divisors, whose sum is σ = 621632340164. Its totient is φ = 621632340162.

The previous prime is 621632340139. The next prime is 621632340223. The reversal of 621632340163 is 361043236126.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-621632340163 is a prime.

It is not a weakly prime, because it can be changed into another prime (621632341163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310816170081 + 310816170082.

It is an arithmetic number, because the mean of its divisors is an integer number (310816170082).

Almost surely, 2^621632340163 is an apocalyptic number.

621632340163 is a deficient number, since it is larger than the sum of its proper divisors (1).

621632340163 is an equidigital number, since it uses as much as digits as its factorization.

621632340163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 37.

Adding to 621632340163 its reverse (361043236126), we get a palindrome (982675576289).

The spelling of 621632340163 in words is "six hundred twenty-one billion, six hundred thirty-two million, three hundred forty thousand, one hundred sixty-three".