1621410034543 has 4 divisors (see below), whose sum is σ = 1746133883368. Its totient is φ = 1496686185720.

The previous prime is 1621410034537. The next prime is 1621410034561. The reversal of 1621410034543 is 3454300141261.

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 1621410034543 - 2⁹ = 1621410034031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1621410034499 and 1621410034508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621410034583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62361924393 + ... + 62361924418.

It is an arithmetic number, because the mean of its divisors is an integer number (436533470842).

Almost surely, 2^{1621410034543} is an apocalyptic number.

1621410034543 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1621410034543 is a deficient number, since it is larger than the sum of its proper divisors (124723848825).

1621410034543 is a wasteful number, since it uses less digits than its factorization.

1621410034543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124723848824.

The product of its (nonzero) digits is 34560, while the sum is 34.

The spelling of 1621410034543 in words is "one trillion, six hundred twenty-one billion, four hundred ten million, thirty-four thousand, five hundred forty-three".