11512116554 has 4 divisors (see below), whose sum is σ = 17268174834. Its totient is φ = 5756058276.

The previous prime is 11512116533. The next prime is 11512116611. The reversal of 11512116554 is 45561121511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 5853015025 + 5659101529 = 76505^2 + 75227^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11512116554.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2878029137 + ... + 2878029140.

Almost surely, 2^11512116554 is an apocalyptic number.

11512116554 is a deficient number, since it is larger than the sum of its proper divisors (5756058280).

11512116554 is an equidigital number, since it uses as much as digits as its factorization.

11512116554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5756058279.

The product of its digits is 6000, while the sum is 32.

The spelling of 11512116554 in words is "eleven billion, five hundred twelve million, one hundred sixteen thousand, five hundred fifty-four".