394010480641 has 4 divisors (see below), whose sum is σ = 394011779652. Its totient is φ = 394009181632.

The previous prime is 394010480599. The next prime is 394010480653. The reversal of 394010480641 is 146084010493.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 146084010493 = 176191 ⋅829123.

It can be written as a sum of positive squares in 2 ways, for example, as 9839846416 + 384170634225 = 99196^2 + 619815^2 .

It is a cyclic number.

It is not a de Polignac number, because 394010480641 - 2²⁹ = 393473609729 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 394010480594 and 394010480603.

It is not an unprimeable number, because it can be changed into a prime (394020480641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74445 + ... + 890821.

It is an arithmetic number, because the mean of its divisors is an integer number (98502944913).

Almost surely, 2^394010480641 is an apocalyptic number.

It is an amenable number.

394010480641 is a deficient number, since it is larger than the sum of its proper divisors (1299011).

394010480641 is an equidigital number, since it uses as much as digits as its factorization.

394010480641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1299010.

The product of its (nonzero) digits is 82944, while the sum is 40.

The spelling of 394010480641 in words is "three hundred ninety-four billion, ten million, four hundred eighty thousand, six hundred forty-one".