401035361661 has 64 divisors (see below), whose sum is σ = 660641184000. Its totient is φ = 238366851840.

The previous prime is 401035361627. The next prime is 401035361663. The reversal of 401035361661 is 166163530104.

401035361661 is a `hidden beast` number, since 4 + 0 + 1 + 0 + 35 + 3 + 616 + 6 + 1 = 666.

It is not a de Polignac number, because 401035361661 - 2²¹ = 401033264509 is a prime.

It is a super-2 number, since 2×401035361661² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401035361663) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 58379935 + ... + 58386803.

It is an arithmetic number, because the mean of its divisors is an integer number (10322518500).

Almost surely, 2^401035361661 is an apocalyptic number.

It is an amenable number.

401035361661 is a deficient number, since it is larger than the sum of its proper divisors (259605822339).

401035361661 is a wasteful number, since it uses less digits than its factorization.

401035361661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10651 (or 10645 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

Adding to 401035361661 its reverse (166163530104), we get a palindrome (567198891765).

The spelling of 401035361661 in words is "four hundred one billion, thirty-five million, three hundred sixty-one thousand, six hundred sixty-one".