1621329394143 has 8 divisors (see below), whose sum is σ = 2161826896048. Its totient is φ = 1080859077504.

The previous prime is 1621329394103. The next prime is 1621329394159. The reversal of 1621329394143 is 3414939231261.

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

It is not a de Polignac number, because 1621329394143 - 2²⁴ = 1621312616927 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1621329394092 and 1621329394101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621329394103) 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, 6656746 + ... + 6896007.

It is an arithmetic number, because the mean of its divisors is an integer number (270228362006).

Almost surely, 2^{1621329394143} is an apocalyptic number.

1621329394143 is a deficient number, since it is larger than the sum of its proper divisors (540497501905).

1621329394143 is a wasteful number, since it uses less digits than its factorization.

1621329394143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13592633.

The product of its digits is 839808, while the sum is 48.

The spelling of 1621329394143 in words is "one trillion, six hundred twenty-one billion, three hundred twenty-nine million, three hundred ninety-four thousand, one hundred forty-three".