1166501511515 has 4 divisors (see below), whose sum is σ = 1399801813824. Its totient is φ = 933201209208.

The previous prime is 1166501511491. The next prime is 1166501511689. The reversal of 1166501511515 is 5151151056611.

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

It is a cyclic number.

It is not a de Polignac number, because 1166501511515 - 2⁶ = 1166501511451 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116650151147 + ... + 116650151156.

It is an arithmetic number, because the mean of its divisors is an integer number (349950453456).

Almost surely, 2^{1166501511515} is an apocalyptic number.

1166501511515 is a deficient number, since it is larger than the sum of its proper divisors (233300302309).

1166501511515 is an equidigital number, since it uses as much as digits as its factorization.

1166501511515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233300302308.

The product of its (nonzero) digits is 22500, while the sum is 38.

The spelling of 1166501511515 in words is "one trillion, one hundred sixty-six billion, five hundred one million, five hundred eleven thousand, five hundred fifteen".