401659645 has 8 divisors (see below), whose sum is σ = 483195960. Its totient is φ = 320524800.

The previous prime is 401659627. The next prime is 401659667. The reversal of 401659645 is 546956104.

It is a happy number.

401659645 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 265657401 + 136002244 = 16299^2 + 11662^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 401659645 - 2²³ = 393271037 is a prime.

It is a super-2 number, since 2×401659645² = 322660940843052050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 401659598 and 401659607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98160 + ... + 102169.

It is an arithmetic number, because the mean of its divisors is an integer number (60399495).

Almost surely, 2^401659645 is an apocalyptic number.

It is an amenable number.

401659645 is a deficient number, since it is larger than the sum of its proper divisors (81536315).

401659645 is a wasteful number, since it uses less digits than its factorization.

401659645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200735.

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 401659645 is about 20041.4481762172. The cubic root of 401659645 is about 737.8239243528.

The spelling of 401659645 in words is "four hundred one million, six hundred fifty-nine thousand, six hundred forty-five".