1601444457 has 6 divisors (see below), whose sum is σ = 2313197562. Its totient is φ = 1067629632.

The previous prime is 1601444441. The next prime is 1601444491. The reversal of 1601444457 is 7544441061.

It is a happy number.

1601444457 is a `hidden beast` number, since 1 + 60 + 144 + 4 + 457 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1515622761 + 85821696 = 38931^2 + 9264^2 .

It is not a de Polignac number, because 1601444457 - 2⁴ = 1601444441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1601444417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 88969128 + ... + 88969145.

It is an arithmetic number, because the mean of its divisors is an integer number (385532927).

Almost surely, 2^1601444457 is an apocalyptic number.

It is an amenable number.

1601444457 is a deficient number, since it is larger than the sum of its proper divisors (711753105).

1601444457 is a wasteful number, since it uses less digits than its factorization.

1601444457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177938279 (or 177938276 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 1601444457 is about 40018.0516392290. The cubic root of 1601444457 is about 1169.9589575785.

The spelling of 1601444457 in words is "one billion, six hundred one million, four hundred forty-four thousand, four hundred fifty-seven".