390544191641 has 2 divisors, whose sum is σ = 390544191642. Its totient is φ = 390544191640.

The previous prime is 390544191619. The next prime is 390544191659. The reversal of 390544191641 is 146191445093.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 264714366016 + 125829825625 = 514504^2 + 354725^2 .

It is a cyclic number.

It is not a de Polignac number, because 390544191641 - 2²⁶ = 390477082777 is a prime.

It is not a weakly prime, because it can be changed into another prime (390544191671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195272095820 + 195272095821.

It is an arithmetic number, because the mean of its divisors is an integer number (195272095821).

Almost surely, 2^390544191641 is an apocalyptic number.

It is an amenable number.

390544191641 is a deficient number, since it is larger than the sum of its proper divisors (1).

390544191641 is an equidigital number, since it uses as much as digits as its factorization.

390544191641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 466560, while the sum is 47.

The spelling of 390544191641 in words is "three hundred ninety billion, five hundred forty-four million, one hundred ninety-one thousand, six hundred forty-one".