621341246056441 has 2 divisors, whose sum is σ = 621341246056442. Its totient is φ = 621341246056440.

The previous prime is 621341246056417. The next prime is 621341246056523. The reversal of 621341246056441 is 144650642143126.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 325975947478416 + 295365298578025 = 18054804^2 + 17186195^2 .

It is a cyclic number.

It is not a de Polignac number, because 621341246056441 - 2¹³ = 621341246048249 is a prime.

It is not a weakly prime, because it can be changed into another prime (621341246006441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310670623028220 + 310670623028221.

It is an arithmetic number, because the mean of its divisors is an integer number (310670623028221).

Almost surely, 2^{621341246056441} is an apocalyptic number.

It is an amenable number.

621341246056441 is a deficient number, since it is larger than the sum of its proper divisors (1).

621341246056441 is an equidigital number, since it uses as much as digits as its factorization.

621341246056441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3317760, while the sum is 49.

Adding to 621341246056441 its reverse (144650642143126), we get a palindrome (765991888199567).

The spelling of 621341246056441 in words is "six hundred twenty-one trillion, three hundred forty-one billion, two hundred forty-six million, fifty-six thousand, four hundred forty-one".