11506655515 has 16 divisors (see below), whose sum is σ = 13946929920. Its totient is φ = 9113035360.

The previous prime is 11506655507. The next prime is 11506655519. The reversal of 11506655515 is 51555660511.

It is not a de Polignac number, because 11506655515 - 2³ = 11506655507 is a prime.

It is a super-2 number, since 2×11506655515² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11506655519) 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, 253482 + ... + 295408.

It is an arithmetic number, because the mean of its divisors is an integer number (871683120).

Almost surely, 2^11506655515 is an apocalyptic number.

11506655515 is a deficient number, since it is larger than the sum of its proper divisors (2440274405).

11506655515 is a wasteful number, since it uses less digits than its factorization.

11506655515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42482.

The product of its (nonzero) digits is 112500, while the sum is 40.

The spelling of 11506655515 in words is "eleven billion, five hundred six million, six hundred fifty-five thousand, five hundred fifteen".