1869552981409 has 8 divisors (see below), whose sum is σ = 1922420182248. Its totient is φ = 1816808872320.

The previous prime is 1869552981397. The next prime is 1869552981419. The reversal of 1869552981409 is 9041892559681.

It can be written as a sum of positive squares in 4 ways, for example, as 358288439184 + 1511264542225 = 598572^2 + 1229335^2 .

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 1869552981409 - 2⁷ = 1869552981281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1869552981419) 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, 30742132 + ... + 30802885.

It is an arithmetic number, because the mean of its divisors is an integer number (240302522781).

Almost surely, 2^{1869552981409} is an apocalyptic number.

It is an amenable number.

1869552981409 is a deficient number, since it is larger than the sum of its proper divisors (52867200839).

1869552981409 is an equidigital number, since it uses as much as digits as its factorization.

1869552981409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61545875.

The product of its (nonzero) digits is 55987200, while the sum is 67.

The spelling of 1869552981409 in words is "one trillion, eight hundred sixty-nine billion, five hundred fifty-two million, nine hundred eighty-one thousand, four hundred nine".