361645483921 has 2 divisors, whose sum is σ = 361645483922. Its totient is φ = 361645483920.

The previous prime is 361645483873. The next prime is 361645483949. The reversal of 361645483921 is 129384546163.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 255848814225 + 105796669696 = 505815^2 + 325264^2 .

It is an emirp because it is prime and its reverse (129384546163) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 361645483921 - 2¹³ = 361645475729 is a prime.

It is not a weakly prime, because it can be changed into another prime (361645483321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180822741960 + 180822741961.

It is an arithmetic number, because the mean of its divisors is an integer number (180822741961).

Almost surely, 2^361645483921 is an apocalyptic number.

It is an amenable number.

361645483921 is a deficient number, since it is larger than the sum of its proper divisors (1).

361645483921 is an equidigital number, since it uses as much as digits as its factorization.

361645483921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3732480, while the sum is 52.

The spelling of 361645483921 in words is "three hundred sixty-one billion, six hundred forty-five million, four hundred eighty-three thousand, nine hundred twenty-one".