401558561217 has 48 divisors (see below), whose sum is σ = 661166438400. Its totient is φ = 232471594080.

The previous prime is 401558561167. The next prime is 401558561237. The reversal of 401558561217 is 712165855104.

401558561217 is a `hidden beast` number, since 4 + 0 + 1 + 5 + 585 + 61 + 2 + 1 + 7 = 666.

It is not a de Polignac number, because 401558561217 - 2⁶ = 401558561153 is a prime.

It is a super-2 number, since 2×401558561217² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401558561237) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1563384 + ... + 1802022.

It is an arithmetic number, because the mean of its divisors is an integer number (13774300800).

Almost surely, 2^401558561217 is an apocalyptic number.

It is an amenable number.

401558561217 is a deficient number, since it is larger than the sum of its proper divisors (259607877183).

401558561217 is a wasteful number, since it uses less digits than its factorization.

401558561217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239418 (or 239415 counting only the distinct ones).

The product of its (nonzero) digits is 336000, while the sum is 45.

The spelling of 401558561217 in words is "four hundred one billion, five hundred fifty-eight million, five hundred sixty-one thousand, two hundred seventeen".