461490361581721 has 2 divisors, whose sum is σ = 461490361581722. Its totient is φ = 461490361581720.

The previous prime is 461490361581673. The next prime is 461490361581841. The reversal of 461490361581721 is 127185163094164.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 337429859901696 + 124060501680025 = 18369264^2 + 11138245^2 .

It is a cyclic number.

It is not a de Polignac number, because 461490361581721 - 2³⁹ = 460940605767833 is a prime.

It is a super-2 number, since 2×461490361581721² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (461490361582721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 230745180790860 + 230745180790861.

It is an arithmetic number, because the mean of its divisors is an integer number (230745180790861).

It is a 1-persistent number, because it is pandigital, but 2⋅461490361581721 = 922980723163442 is not.

Almost surely, 2^{461490361581721} is an apocalyptic number.

It is an amenable number.

461490361581721 is a deficient number, since it is larger than the sum of its proper divisors (1).

461490361581721 is an equidigital number, since it uses as much as digits as its factorization.

461490361581721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8709120, while the sum is 58.

The spelling of 461490361581721 in words is "four hundred sixty-one trillion, four hundred ninety billion, three hundred sixty-one million, five hundred eighty-one thousand, seven hundred twenty-one".