464512641025681 has 2 divisors, whose sum is σ = 464512641025682. Its totient is φ = 464512641025680.

The previous prime is 464512641025661. The next prime is 464512641025799. The reversal of 464512641025681 is 186520146215464.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 310252291440400 + 154260349585281 = 17613980^2 + 12420159^2 .

It is a cyclic number.

It is not a de Polignac number, because 464512641025681 - 2¹³ = 464512641017489 is a prime.

It is a super-2 number, since 2×464512641025681² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (464512641025661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 232256320512840 + 232256320512841.

It is an arithmetic number, because the mean of its divisors is an integer number (232256320512841).

Almost surely, 2^{464512641025681} is an apocalyptic number.

It is an amenable number.

464512641025681 is a deficient number, since it is larger than the sum of its proper divisors (1).

464512641025681 is an equidigital number, since it uses as much as digits as its factorization.

464512641025681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11059200, while the sum is 55.

The spelling of 464512641025681 in words is "four hundred sixty-four trillion, five hundred twelve billion, six hundred forty-one million, twenty-five thousand, six hundred eighty-one".