406143353421 has 96 divisors (see below), whose sum is σ = 668822192640. Its totient is φ = 243386208000.

The previous prime is 406143353417. The next prime is 406143353423. The reversal of 406143353421 is 124353341604.

406143353421 is a `hidden beast` number, since 4 + 0 + 61 + 43 + 3 + 534 + 21 = 666.

It is not a de Polignac number, because 406143353421 - 2² = 406143353417 is a prime.

It is a super-3 number, since 3×406143353421³ (a number of 36 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406143353423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 28105420 + ... + 28119866.

It is an arithmetic number, because the mean of its divisors is an integer number (6966897840).

Almost surely, 2^406143353421 is an apocalyptic number.

It is an amenable number.

406143353421 is a deficient number, since it is larger than the sum of its proper divisors (262678839219).

406143353421 is a wasteful number, since it uses less digits than its factorization.

406143353421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14644 (or 14625 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The spelling of 406143353421 in words is "four hundred six billion, one hundred forty-three million, three hundred fifty-three thousand, four hundred twenty-one".