641332315515251 has 2 divisors, whose sum is σ = 641332315515252. Its totient is φ = 641332315515250.

The previous prime is 641332315515233. The next prime is 641332315515271. The reversal of 641332315515251 is 152515513233146.

641332315515251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 641332315515251 - 2¹⁴ = 641332315498867 is a prime.

It is a super-2 number, since 2×641332315515251² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 641332315515196 and 641332315515205.

It is not a weakly prime, because it can be changed into another prime (641332315515271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320666157757625 + 320666157757626.

It is an arithmetic number, because the mean of its divisors is an integer number (320666157757626).

Almost surely, 2^{641332315515251} is an apocalyptic number.

641332315515251 is a deficient number, since it is larger than the sum of its proper divisors (1).

641332315515251 is an equidigital number, since it uses as much as digits as its factorization.

641332315515251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1620000, while the sum is 47.

Adding to 641332315515251 its reverse (152515513233146), we get a palindrome (793847828748397).

The spelling of 641332315515251 in words is "six hundred forty-one trillion, three hundred thirty-two billion, three hundred fifteen million, five hundred fifteen thousand, two hundred fifty-one".