11519209138 has 8 divisors (see below), whose sum is σ = 17303464620. Its totient is φ = 5751387600.

The previous prime is 11519209099. The next prime is 11519209153. The reversal of 11519209138 is 83190291511.

It can be written as a sum of positive squares in 2 ways, for example, as 10093618089 + 1425591049 = 100467^2 + 37757^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 11519209138.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4106733 + ... + 4109536.

Almost surely, 2^11519209138 is an apocalyptic number.

11519209138 is a deficient number, since it is larger than the sum of its proper divisors (5784255482).

11519209138 is an equidigital number, since it uses as much as digits as its factorization.

11519209138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8216972.

The product of its (nonzero) digits is 19440, while the sum is 40.

The spelling of 11519209138 in words is "eleven billion, five hundred nineteen million, two hundred nine thousand, one hundred thirty-eight".