11898355865 has 16 divisors (see below), whose sum is σ = 15642896256. Its totient is φ = 8616201600.

The previous prime is 11898355853. The next prime is 11898355873. The reversal of 11898355865 is 56855389811.

It is not a de Polignac number, because 11898355865 - 2⁶ = 11898355801 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 451421 + ... + 477050.

It is an arithmetic number, because the mean of its divisors is an integer number (977681016).

Almost surely, 2^11898355865 is an apocalyptic number.

It is an amenable number.

11898355865 is a deficient number, since it is larger than the sum of its proper divisors (3744540391).

11898355865 is a wasteful number, since it uses less digits than its factorization.

11898355865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928720.

The product of its digits is 10368000, while the sum is 59.

It can be divided in two parts, 11898 and 355865, that added together give a palindrome (367763).

The spelling of 11898355865 in words is "eleven billion, eight hundred ninety-eight million, three hundred fifty-five thousand, eight hundred sixty-five".