401366403446421 has 8 divisors (see below), whose sum is σ = 611605948108864. Its totient is φ = 229352230540800.

The previous prime is 401366403446401. The next prime is 401366403446479. The reversal of 401366403446421 is 124644304663104.

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

It is not a de Polignac number, because 401366403446421 - 2²⁷ = 401366269228693 is a prime.

It is a super-2 number, since 2×401366403446421² (a number of 30 digits) contains 22 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 (401366403446401) 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, 9556342939180 + ... + 9556342939221.

It is an arithmetic number, because the mean of its divisors is an integer number (76450743513608).

Almost surely, 2^{401366403446421} is an apocalyptic number.

It is an amenable number.

401366403446421 is a deficient number, since it is larger than the sum of its proper divisors (210239544662443).

401366403446421 is a wasteful number, since it uses less digits than its factorization.

401366403446421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19112685878411.

The product of its (nonzero) digits is 3981312, while the sum is 48.

The spelling of 401366403446421 in words is "four hundred one trillion, three hundred sixty-six billion, four hundred three million, four hundred forty-six thousand, four hundred twenty-one".