404151444661 has 2 divisors, whose sum is σ = 404151444662. Its totient is φ = 404151444660.

The previous prime is 404151444623. The next prime is 404151444667. The reversal of 404151444661 is 166444151404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 297372811761 + 106778632900 = 545319^2 + 326770^2 .

It is a cyclic number.

It is not a de Polignac number, because 404151444661 - 2¹¹ = 404151442613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404151444667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202075722330 + 202075722331.

It is an arithmetic number, because the mean of its divisors is an integer number (202075722331).

Almost surely, 2^404151444661 is an apocalyptic number.

It is an amenable number.

404151444661 is a deficient number, since it is larger than the sum of its proper divisors (1).

404151444661 is an equidigital number, since it uses as much as digits as its factorization.

404151444661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 184320, while the sum is 40.

The spelling of 404151444661 in words is "four hundred four billion, one hundred fifty-one million, four hundred forty-four thousand, six hundred sixty-one".