361004643521 has 2 divisors, whose sum is σ = 361004643522. Its totient is φ = 361004643520.

The previous prime is 361004643499. The next prime is 361004643653. The reversal of 361004643521 is 125346400163.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 356843748496 + 4160895025 = 597364^2 + 64505^2 .

It is a cyclic number.

It is not a de Polignac number, because 361004643521 - 2⁶ = 361004643457 is a prime.

It is not a weakly prime, because it can be changed into another prime (361004643721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180502321760 + 180502321761.

It is an arithmetic number, because the mean of its divisors is an integer number (180502321761).

Almost surely, 2^361004643521 is an apocalyptic number.

It is an amenable number.

361004643521 is a deficient number, since it is larger than the sum of its proper divisors (1).

361004643521 is an equidigital number, since it uses as much as digits as its factorization.

361004643521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 35.

The spelling of 361004643521 in words is "three hundred sixty-one billion, four million, six hundred forty-three thousand, five hundred twenty-one".