11839435865 has 8 divisors (see below), whose sum is σ = 14248033800. Its totient is φ = 9444408192.

The previous prime is 11839435763. The next prime is 11839435903. The reversal of 11839435865 is 56853493811.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4439823424 + 7399612441 = 66632^2 + 86021^2 .

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 11839435865 - 2¹⁸ = 11839173721 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3390644 + ... + 3394133.

It is an arithmetic number, because the mean of its divisors is an integer number (1781004225).

Almost surely, 2^11839435865 is an apocalyptic number.

It is an amenable number.

11839435865 is a deficient number, since it is larger than the sum of its proper divisors (2408597935).

11839435865 is an equidigital number, since it uses as much as digits as its factorization.

11839435865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6785131.

The product of its digits is 3110400, while the sum is 53.

The spelling of 11839435865 in words is "eleven billion, eight hundred thirty-nine million, four hundred thirty-five thousand, eight hundred sixty-five".