401668178013 has 24 divisors (see below), whose sum is σ = 584392337568. Its totient is φ = 265841665632.

The previous prime is 401668177997. The next prime is 401668178033. The reversal of 401668178013 is 310871866104.

401668178013 is a `hidden beast` number, since 401 + 6 + 68 + 178 + 0 + 13 = 666.

It is not a de Polignac number, because 401668178013 - 2⁴ = 401668177997 is a prime.

It is a super-2 number, since 2×401668178013² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 401668178013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401668178033) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1179631 + ... + 1481507.

It is an arithmetic number, because the mean of its divisors is an integer number (24349680732).

Almost surely, 2^401668178013 is an apocalyptic number.

It is an amenable number.

401668178013 is a deficient number, since it is larger than the sum of its proper divisors (182724159555).

401668178013 is a wasteful number, since it uses less digits than its factorization.

401668178013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302953 (or 302950 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The spelling of 401668178013 in words is "four hundred one billion, six hundred sixty-eight million, one hundred seventy-eight thousand, thirteen".