11506001155 has 16 divisors (see below), whose sum is σ = 15067067904. Its totient is φ = 8365408480.

The previous prime is 11506001153. The next prime is 11506001167. The reversal of 11506001155 is 55110060511.

It is not a de Polignac number, because 11506001155 - 2¹ = 11506001153 is a prime.

It is a super-2 number, since 2×11506001155² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11506001153) 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, 156684 + ... + 218086.

It is an arithmetic number, because the mean of its divisors is an integer number (941691744).

Almost surely, 2^11506001155 is an apocalyptic number.

11506001155 is a deficient number, since it is larger than the sum of its proper divisors (3561066749).

11506001155 is a wasteful number, since it uses less digits than its factorization.

11506001155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64826.

The product of its (nonzero) digits is 750, while the sum is 25.

Adding to 11506001155 its reverse (55110060511), we get a palindrome (66616061666).

The spelling of 11506001155 in words is "eleven billion, five hundred six million, one thousand, one hundred fifty-five".