1643842749059 has 8 divisors (see below), whose sum is σ = 1929452493408. Its totient is φ = 1370926771200.

The previous prime is 1643842749047. The next prime is 1643842749061. The reversal of 1643842749059 is 9509472483461.

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

It is not a de Polignac number, because 1643842749059 - 2¹⁶ = 1643842683523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1643842748992 and 1643842749010.

It is not an unprimeable number, because it can be changed into a prime (1643842749359) 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, 3173441342 + ... + 3173441859.

It is an arithmetic number, because the mean of its divisors is an integer number (241181561676).

It is a 1-persistent number, because it is pandigital, but 2⋅1643842749059 = 3287685498118 is not.

Almost surely, 2^{1643842749059} is an apocalyptic number.

1643842749059 is a deficient number, since it is larger than the sum of its proper divisors (285609744349).

1643842749059 is an equidigital number, since it uses as much as digits as its factorization.

1643842749059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6346883245.

The product of its (nonzero) digits is 52254720, while the sum is 62.

The spelling of 1643842749059 in words is "one trillion, six hundred forty-three billion, eight hundred forty-two million, seven hundred forty-nine thousand, fifty-nine".