401644701 has 12 divisors (see below), whose sum is σ = 582646428. Its totient is φ = 266612544.

The previous prime is 401644687. The next prime is 401644717. The reversal of 401644701 is 107446104.

It can be written as a sum of positive squares in 2 ways, for example, as 132848676 + 268796025 = 11526^2 + 16395^2 .

It is not a de Polignac number, because 401644701 - 2⁹ = 401644189 is a prime.

It is a super-2 number, since 2×401644701² = 322636931682758802, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401644721) 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 11 ways as a sum of consecutive naturals, for example, 93670 + ... + 97863.

It is an arithmetic number, because the mean of its divisors is an integer number (48553869).

Almost surely, 2^401644701 is an apocalyptic number.

It is an amenable number.

401644701 is a deficient number, since it is larger than the sum of its proper divisors (181001727).

401644701 is a wasteful number, since it uses less digits than its factorization.

401644701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191772 (or 191769 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 401644701 is about 20041.0753454000. The cubic root of 401644701 is about 737.8147738381.

The spelling of 401644701 in words is "four hundred one million, six hundred forty-four thousand, seven hundred one".