621132256411 has 2 divisors, whose sum is σ = 621132256412. Its totient is φ = 621132256410.

The previous prime is 621132256403. The next prime is 621132256447. The reversal of 621132256411 is 114652231126.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 621132256411 - 2³ = 621132256403 is a prime.

It is not a weakly prime, because it can be changed into another prime (621132256711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310566128205 + 310566128206.

It is an arithmetic number, because the mean of its divisors is an integer number (310566128206).

Almost surely, 2^621132256411 is an apocalyptic number.

621132256411 is a deficient number, since it is larger than the sum of its proper divisors (1).

621132256411 is an equidigital number, since it uses as much as digits as its factorization.

621132256411 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 34.

Adding to 621132256411 its reverse (114652231126), we get a palindrome (735784487537).

The spelling of 621132256411 in words is "six hundred twenty-one billion, one hundred thirty-two million, two hundred fifty-six thousand, four hundred eleven".