11615128887 has 32 divisors (see below), whose sum is σ = 16845373440. Its totient is φ = 7091820000.

The previous prime is 11615128883. The next prime is 11615128901. The reversal of 11615128887 is 78882151611.

It is a happy number.

11615128887 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11615128887 - 2² = 11615128883 is a prime.

It is a super-2 number, since 2×11615128887² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11615128883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2030962 + ... + 2036672.

It is an arithmetic number, because the mean of its divisors is an integer number (526417920).

Almost surely, 2^11615128887 is an apocalyptic number.

11615128887 is a deficient number, since it is larger than the sum of its proper divisors (5230244553).

11615128887 is a wasteful number, since it uses less digits than its factorization.

11615128887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6915.

The product of its digits is 215040, while the sum is 48.

The spelling of 11615128887 in words is "eleven billion, six hundred fifteen million, one hundred twenty-eight thousand, eight hundred eighty-seven".