1621145643341 has 8 divisors (see below), whose sum is σ = 1870053186240. Its totient is φ = 1376566927488.

The previous prime is 1621145643331. The next prime is 1621145643371. The reversal of 1621145643341 is 1433465411261.

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

It is a cyclic number.

It is not a de Polignac number, because 1621145643341 - 2¹⁸ = 1621145381197 is a prime.

It is a super-2 number, since 2×1621145643341² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621145643311) 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, 1082205956 + ... + 1082207453.

It is an arithmetic number, because the mean of its divisors is an integer number (233756648280).

Almost surely, 2^{1621145643341} is an apocalyptic number.

It is an amenable number.

1621145643341 is a deficient number, since it is larger than the sum of its proper divisors (248907542899).

1621145643341 is a wasteful number, since it uses less digits than its factorization.

1621145643341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2164413523.

The product of its digits is 207360, while the sum is 41.

The spelling of 1621145643341 in words is "one trillion, six hundred twenty-one billion, one hundred forty-five million, six hundred forty-three thousand, three hundred forty-one".