401820163216 has 20 divisors (see below), whose sum is σ = 779683387372. Its totient is φ = 200611547136.

The previous prime is 401820163163. The next prime is 401820163273. The reversal of 401820163216 is 612361028104.

It can be written as a sum of positive squares in 2 ways, for example, as 296584803216 + 105235360000 = 544596^2 + 324400^2 .

It is a super-2 number, since 2×401820163216² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18647301 + ... + 18668836.

Almost surely, 2^401820163216 is an apocalyptic number.

It is an amenable number.

401820163216 is a deficient number, since it is larger than the sum of its proper divisors (377863224156).

401820163216 is a wasteful number, since it uses less digits than its factorization.

401820163216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37316818 (or 37316812 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The spelling of 401820163216 in words is "four hundred one billion, eight hundred twenty million, one hundred sixty-three thousand, two hundred sixteen".