621341246056523 has 2 divisors, whose sum is σ = 621341246056524. Its totient is φ = 621341246056522.

The previous prime is 621341246056441. The next prime is 621341246056529. The reversal of 621341246056523 is 325650642143126.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-621341246056523 is a prime.

It is not a weakly prime, because it can be changed into another prime (621341246056529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310670623028261 + 310670623028262.

It is an arithmetic number, because the mean of its divisors is an integer number (310670623028262).

Almost surely, 2^{621341246056523} is an apocalyptic number.

621341246056523 is a deficient number, since it is larger than the sum of its proper divisors (1).

621341246056523 is an equidigital number, since it uses as much as digits as its factorization.

621341246056523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6220800, while the sum is 50.

Adding to 621341246056523 its reverse (325650642143126), we get a palindrome (946991888199649).

The spelling of 621341246056523 in words is "six hundred twenty-one trillion, three hundred forty-one billion, two hundred forty-six million, fifty-six thousand, five hundred twenty-three".