11538552511 has 8 divisors (see below), whose sum is σ = 12218239584. Its totient is φ = 10858970880.

The previous prime is 11538552497. The next prime is 11538552517. The reversal of 11538552511 is 11525583511.

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 11538552511 - 2⁵ = 11538552479 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11538552517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 365491 + ... + 395803.

It is an arithmetic number, because the mean of its divisors is an integer number (1527279948).

Almost surely, 2^11538552511 is an apocalyptic number.

11538552511 is a deficient number, since it is larger than the sum of its proper divisors (679687073).

11538552511 is a wasteful number, since it uses less digits than its factorization.

11538552511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52721.

The product of its digits is 30000, while the sum is 37.

The spelling of 11538552511 in words is "eleven billion, five hundred thirty-eight million, five hundred fifty-two thousand, five hundred eleven".