11893015985 has 8 divisors (see below), whose sum is σ = 14302850856. Its totient is φ = 9493591680.

The previous prime is 11893015889. The next prime is 11893016011. The reversal of 11893015985 is 58951039811.

It can be written as a sum of positive squares in 4 ways, for example, as 1073479696 + 10819536289 = 32764^2 + 104017^2 .

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

It is not a de Polignac number, because 11893015985 - 2²⁸ = 11624580529 is a prime.

It is a Duffinian number.

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, 2600126 + ... + 2604695.

It is an arithmetic number, because the mean of its divisors is an integer number (1787856357).

Almost surely, 2^11893015985 is an apocalyptic number.

It is an amenable number.

11893015985 is a deficient number, since it is larger than the sum of its proper divisors (2409834871).

11893015985 is an equidigital number, since it uses as much as digits as its factorization.

11893015985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5205283.

The product of its (nonzero) digits is 388800, while the sum is 50.

The spelling of 11893015985 in words is "eleven billion, eight hundred ninety-three million, fifteen thousand, nine hundred eighty-five".