143421399999 has 12 divisors (see below), whose sum is σ = 207912133416. Its totient is φ = 95269087152.

The previous prime is 143421399991. The next prime is 143421400019. The reversal of 143421399999 is 999993124341.

143421399999 is a `hidden beast` number, since 1 + 4 + 3 + 421 + 39 + 99 + 99 = 666.

It is not a de Polignac number, because 143421399999 - 2³ = 143421399991 is a prime.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143421399991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28762329 + ... + 28767314.

It is an arithmetic number, because the mean of its divisors is an integer number (17326011118).

Almost surely, 2^143421399999 is an apocalyptic number.

143421399999 is a deficient number, since it is larger than the sum of its proper divisors (64490733417).

143421399999 is a wasteful number, since it uses less digits than its factorization.

143421399999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57529926 (or 57529923 counting only the distinct ones).

The product of its digits is 17006112, while the sum is 63.

The spelling of 143421399999 in words is "one hundred forty-three billion, four hundred twenty-one million, three hundred ninety-nine thousand, nine hundred ninety-nine".