11271511215516 has 12 divisors (see below), whose sum is σ = 26300192836232. Its totient is φ = 3757170405168.

The previous prime is 11271511215499. The next prime is 11271511215563. The reversal of 11271511215516 is 61551211517211.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

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, 469646300635 + ... + 469646300658.

Almost surely, 2^{11271511215516} is an apocalyptic number.

It is an amenable number.

11271511215516 is an abundant number, since it is smaller than the sum of its proper divisors (15028681620716).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11271511215516 is a wasteful number, since it uses less digits than its factorization.

11271511215516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939292601300 (or 939292601298 counting only the distinct ones).

The product of its digits is 21000, while the sum is 39.

The spelling of 11271511215516 in words is "eleven trillion, two hundred seventy-one billion, five hundred eleven million, two hundred fifteen thousand, five hundred sixteen".