401665091284 has 24 divisors (see below), whose sum is σ = 731414251008. Its totient is φ = 192850837920.

The previous prime is 401665091273. The next prime is 401665091293. The reversal of 401665091284 is 482190566104.

It is a happy number.

It is a super-2 number, since 2×401665091284² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20145852 + ... + 20165779.

It is an arithmetic number, because the mean of its divisors is an integer number (30475593792).

Almost surely, 2^401665091284 is an apocalyptic number.

It is an amenable number.

401665091284 is a deficient number, since it is larger than the sum of its proper divisors (329749159724).

401665091284 is a wasteful number, since it uses less digits than its factorization.

401665091284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40311735 (or 40311733 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 46.

The spelling of 401665091284 in words is "four hundred one billion, six hundred sixty-five million, ninety-one thousand, two hundred eighty-four".