11506015413 has 10 divisors (see below), whose sum is σ = 17187998454. Its totient is φ = 7670676888.

The previous prime is 11506015349. The next prime is 11506015441. The reversal of 11506015413 is 31451060511.

11506015413 is a `hidden beast` number, since 1 + 1 + 5 + 0 + 601 + 54 + 1 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10275268689 + 1230746724 = 101367^2 + 35082^2 .

It is not a de Polignac number, because 11506015413 - 2⁶ = 11506015349 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11506015513) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 71024706 + ... + 71024867.

Almost surely, 2^11506015413 is an apocalyptic number.

It is an amenable number.

11506015413 is a deficient number, since it is larger than the sum of its proper divisors (5681983041).

11506015413 is an equidigital number, since it uses as much as digits as its factorization.

11506015413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142049585 (or 142049576 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

Adding to 11506015413 its reverse (31451060511), we get a palindrome (42957075924).

The spelling of 11506015413 in words is "eleven billion, five hundred six million, fifteen thousand, four hundred thirteen".