390545347561 has 2 divisors, whose sum is σ = 390545347562. Its totient is φ = 390545347560.

The previous prime is 390545347417. The next prime is 390545347583. The reversal of 390545347561 is 165743545093.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 385020250000 + 5525097561 = 620500^2 + 74331^2 .

It is a cyclic number.

It is not a de Polignac number, because 390545347561 - 2¹¹ = 390545345513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 390545347499 and 390545347508.

It is not a weakly prime, because it can be changed into another prime (390545347861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195272673780 + 195272673781.

It is an arithmetic number, because the mean of its divisors is an integer number (195272673781).

Almost surely, 2^390545347561 is an apocalyptic number.

It is an amenable number.

390545347561 is a deficient number, since it is larger than the sum of its proper divisors (1).

390545347561 is an equidigital number, since it uses as much as digits as its factorization.

390545347561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804000, while the sum is 52.

The spelling of 390545347561 in words is "three hundred ninety billion, five hundred forty-five million, three hundred forty-seven thousand, five hundred sixty-one".