861339093409 has 8 divisors (see below), whose sum is σ = 884706403328. Its totient is φ = 837976408560.

The previous prime is 861339093403. The next prime is 861339093451. The reversal of 861339093409 is 904390933168.

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 861339093409 - 2³⁹ = 311583279521 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 861339093409.

It is not an unprimeable number, because it can be changed into a prime (861339093403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 777087 + ... + 1525300.

It is an arithmetic number, because the mean of its divisors is an integer number (110588300416).

Almost surely, 2^861339093409 is an apocalyptic number.

It is an amenable number.

861339093409 is a deficient number, since it is larger than the sum of its proper divisors (23367309919).

861339093409 is a wasteful number, since it uses less digits than its factorization.

861339093409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2312535.

The product of its (nonzero) digits is 3779136, while the sum is 55.

The spelling of 861339093409 in words is "eight hundred sixty-one billion, three hundred thirty-nine million, ninety-three thousand, four hundred nine".