11529686618 has 12 divisors (see below), whose sum is σ = 17431828362. Its totient is φ = 5719434840.

The previous prime is 11529686611. The next prime is 11529686639. The reversal of 11529686618 is 81668692511.

It can be written as a sum of positive squares in only one way, i.e., 10608382009 + 921304609 = 102997^2 + 30353^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11529686618.

It is not an unprimeable number, because it can be changed into a prime (11529686611) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 146453 + ... + 210968.

Almost surely, 2^11529686618 is an apocalyptic number.

11529686618 is a deficient number, since it is larger than the sum of its proper divisors (5902141744).

11529686618 is an equidigital number, since it uses as much as digits as its factorization.

11529686618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357677 (or 357550 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 53.

The spelling of 11529686618 in words is "eleven billion, five hundred twenty-nine million, six hundred eighty-six thousand, six hundred eighteen".