11161287915 has 16 divisors (see below), whose sum is σ = 18102693408. Its totient is φ = 5871142656.

The previous prime is 11161287911. The next prime is 11161287919. The reversal of 11161287915 is 51978216111.

It is an interprime number because it is at equal distance from previous prime (11161287911) and next prime (11161287919).

It is not a de Polignac number, because 11161287915 - 2² = 11161287911 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11161287911) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 5095384 + ... + 5097573.

It is an arithmetic number, because the mean of its divisors is an integer number (1131418338).

Almost surely, 2^11161287915 is an apocalyptic number.

11161287915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11161287915 is a deficient number, since it is larger than the sum of its proper divisors (6941405493).

11161287915 is a wasteful number, since it uses less digits than its factorization.

11161287915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10193038.

The product of its digits is 30240, while the sum is 42.

The spelling of 11161287915 in words is "eleven billion, one hundred sixty-one million, two hundred eighty-seven thousand, nine hundred fifteen".