401650641 has 24 divisors (see below), whose sum is σ = 664233024. Its totient is φ = 229102560.

The previous prime is 401650603. The next prime is 401650643. The reversal of 401650641 is 146056104.

401650641 is a `hidden beast` number, since 4 + 0 + 1 + 650 + 6 + 4 + 1 = 666.

It is not a de Polignac number, because 401650641 - 2¹⁰ = 401649617 is a prime.

It is a super-2 number, since 2×401650641² = 322646474831421762, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (401650643) 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 23 ways as a sum of consecutive naturals, for example, 31551 + ... + 42411.

It is an arithmetic number, because the mean of its divisors is an integer number (27676376).

Almost surely, 2^401650641 is an apocalyptic number.

It is an amenable number.

401650641 is a deficient number, since it is larger than the sum of its proper divisors (262582383).

401650641 is a wasteful number, since it uses less digits than its factorization.

401650641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11461 (or 11458 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 401650641 is about 20041.2235404927. The cubic root of 401650641 is about 737.8184110479.

The spelling of 401650641 in words is "four hundred one million, six hundred fifty thousand, six hundred forty-one".