401610645 has 12 divisors (see below), whose sum is σ = 696125196. Its totient is φ = 214192320.

The previous prime is 401610637. The next prime is 401610661. The reversal of 401610645 is 546016104.

401610645 is a `hidden beast` number, since 4 + 0 + 1 + 6 + 10 + 645 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 237591396 + 164019249 = 15414^2 + 12807^2 .

It is not a de Polignac number, because 401610645 - 2³ = 401610637 is a prime.

It is a super-2 number, since 2×401610645² = 322582220354632050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4462296 + ... + 4462385.

It is an arithmetic number, because the mean of its divisors is an integer number (58010433).

Almost surely, 2^401610645 is an apocalyptic number.

401610645 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

401610645 is a deficient number, since it is larger than the sum of its proper divisors (294514551).

401610645 is a wasteful number, since it uses less digits than its factorization.

401610645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8924692 (or 8924689 counting only the distinct ones).

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

The square root of 401610645 is about 20040.2256723820. The cubic root of 401610645 is about 737.7939198096.

Adding to 401610645 its reverse (546016104), we get a palindrome (947626749).

The spelling of 401610645 in words is "four hundred one million, six hundred ten thousand, six hundred forty-five".