11867515517 has 16 divisors (see below), whose sum is σ = 14423028480. Its totient is φ = 9615345600.

The previous prime is 11867515507. The next prime is 11867515549. The reversal of 11867515517 is 71551576811.

It is a cyclic number.

It is not a de Polignac number, because 11867515517 - 2²⁸ = 11599080061 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 (11867515507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1426709 + ... + 1435002.

It is an arithmetic number, because the mean of its divisors is an integer number (901439280).

Almost surely, 2^11867515517 is an apocalyptic number.

It is an amenable number.

11867515517 is a deficient number, since it is larger than the sum of its proper divisors (2555512963).

11867515517 is a wasteful number, since it uses less digits than its factorization.

11867515517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2861764.

The product of its digits is 294000, while the sum is 47.

The spelling of 11867515517 in words is "eleven billion, eight hundred sixty-seven million, five hundred fifteen thousand, five hundred seventeen".