401673634217 has 16 divisors (see below), whose sum is σ = 432863692800. Its totient is φ = 371869081920.

The previous prime is 401673634213. The next prime is 401673634231. The reversal of 401673634217 is 712436376104.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 401673634217 - 2² = 401673634213 is a prime.

It is a super-2 number, since 2×401673634217² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401673634211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1951553 + ... + 2147534.

It is an arithmetic number, because the mean of its divisors is an integer number (27053980800).

Almost surely, 2^401673634217 is an apocalyptic number.

It is an amenable number.

401673634217 is a deficient number, since it is larger than the sum of its proper divisors (31190058583).

401673634217 is a wasteful number, since it uses less digits than its factorization.

401673634217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4099256.

The product of its (nonzero) digits is 508032, while the sum is 44.

The spelling of 401673634217 in words is "four hundred one billion, six hundred seventy-three million, six hundred thirty-four thousand, two hundred seventeen".