401664401031 has 4 divisors (see below), whose sum is σ = 535552534712. Its totient is φ = 267776267352.

The previous prime is 401664401011. The next prime is 401664401041. The reversal of 401664401031 is 130104466104.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 401664401031 - 2⁵ = 401664400999 is a prime.

It is a super-3 number, since 3×401664401031³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 401664401031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401664401011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66944066836 + ... + 66944066841.

It is an arithmetic number, because the mean of its divisors is an integer number (133888133678).

Almost surely, 2^401664401031 is an apocalyptic number.

401664401031 is a deficient number, since it is larger than the sum of its proper divisors (133888133681).

401664401031 is a wasteful number, since it uses less digits than its factorization.

401664401031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133888133680.

The product of its (nonzero) digits is 6912, while the sum is 30.

Adding to 401664401031 its reverse (130104466104), we get a palindrome (531768867135).

The spelling of 401664401031 in words is "four hundred one billion, six hundred sixty-four million, four hundred one thousand, thirty-one".