11071611517 has 4 divisors (see below), whose sum is σ = 11071831456. Its totient is φ = 11071391580.

The previous prime is 11071611479. The next prime is 11071611521. The reversal of 11071611517 is 71511617011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11071611517 - 2⁷ = 11071611389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11071611557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7042 + ... + 148972.

It is an arithmetic number, because the mean of its divisors is an integer number (2767957864).

Almost surely, 2^11071611517 is an apocalyptic number.

It is an amenable number.

11071611517 is a deficient number, since it is larger than the sum of its proper divisors (219939).

11071611517 is an equidigital number, since it uses as much as digits as its factorization.

11071611517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219938.

The product of its (nonzero) digits is 1470, while the sum is 31.

The spelling of 11071611517 in words is "eleven billion, seventy-one million, six hundred eleven thousand, five hundred seventeen".