1621003550143 has 4 divisors (see below), whose sum is σ = 1623630785040. Its totient is φ = 1618376315248.

The previous prime is 1621003550141. The next prime is 1621003550161. The reversal of 1621003550143 is 3410553001261.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1621003550143 - 2¹ = 1621003550141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621003550141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1313616523 + ... + 1313617756.

It is an arithmetic number, because the mean of its divisors is an integer number (405907696260).

Almost surely, 2^{1621003550143} is an apocalyptic number.

1621003550143 is a deficient number, since it is larger than the sum of its proper divisors (2627234897).

1621003550143 is an equidigital number, since it uses as much as digits as its factorization.

1621003550143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2627234896.

The product of its (nonzero) digits is 10800, while the sum is 31.

The spelling of 1621003550143 in words is "one trillion, six hundred twenty-one billion, three million, five hundred fifty thousand, one hundred forty-three".