11615128478 has 16 divisors (see below), whose sum is σ = 18182948256. Its totient is φ = 5554222080.

The previous prime is 11615128463. The next prime is 11615128487. The reversal of 11615128478 is 87482151611.

It is a happy number.

11615128478 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×11615128478² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 377150 + ... + 406782.

It is an arithmetic number, because the mean of its divisors is an integer number (1136434266).

Almost surely, 2^11615128478 is an apocalyptic number.

11615128478 is a deficient number, since it is larger than the sum of its proper divisors (6567819778).

11615128478 is a wasteful number, since it uses less digits than its factorization.

11615128478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38179.

The product of its digits is 107520, while the sum is 44.

The spelling of 11615128478 in words is "eleven billion, six hundred fifteen million, one hundred twenty-eight thousand, four hundred seventy-eight".