11665512530 has 32 divisors (see below), whose sum is σ = 24450418944. Its totient is φ = 3924138816.

The previous prime is 11665512511. The next prime is 11665512533. The reversal of 11665512530 is 3521556611.

11665512530 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (11665512533) 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, 1568462 + ... + 1575881.

It is an arithmetic number, because the mean of its divisors is an integer number (764075592).

Almost surely, 2^11665512530 is an apocalyptic number.

11665512530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11665512530 is an abundant number, since it is smaller than the sum of its proper divisors (12784906414).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11665512530 is a wasteful number, since it uses less digits than its factorization.

11665512530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3144410.

The product of its (nonzero) digits is 27000, while the sum is 35.

The spelling of 11665512530 in words is "eleven billion, six hundred sixty-five million, five hundred twelve thousand, five hundred thirty".