400631503162421 has 8 divisors (see below), whose sum is σ = 400842719040384. Its totient is φ = 400420341530640.

The previous prime is 400631503162411. The next prime is 400631503162441. The reversal of 400631503162421 is 124261305136004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 400631503162421 - 2²⁶ = 400631436053557 is a prime.

It is a super-3 number, since 3×400631503162421³ (a number of 45 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400631503162411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1217456 + ... + 28332758.

It is an arithmetic number, because the mean of its divisors is an integer number (50105339880048).

Almost surely, 2^{400631503162421} is an apocalyptic number.

It is an amenable number.

400631503162421 is a deficient number, since it is larger than the sum of its proper divisors (211215877963).

400631503162421 is a wasteful number, since it uses less digits than its factorization.

400631503162421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27123091.

The product of its (nonzero) digits is 103680, while the sum is 38.

Adding to 400631503162421 its reverse (124261305136004), we get a palindrome (524892808298425).

The spelling of 400631503162421 in words is "four hundred trillion, six hundred thirty-one billion, five hundred three million, one hundred sixty-two thousand, four hundred twenty-one".