11521214545 has 8 divisors (see below), whose sum is σ = 13897843200. Its totient is φ = 9168714480.

The previous prime is 11521214543. The next prime is 11521214567. The reversal of 11521214545 is 54541212511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11521214545 - 2¹ = 11521214543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11521214543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6031095 + ... + 6033004.

It is an arithmetic number, because the mean of its divisors is an integer number (1737230400).

Almost surely, 2^11521214545 is an apocalyptic number.

It is an amenable number.

11521214545 is a deficient number, since it is larger than the sum of its proper divisors (2376628655).

11521214545 is a wasteful number, since it uses less digits than its factorization.

11521214545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12064295.

The product of its digits is 8000, while the sum is 31.

The spelling of 11521214545 in words is "eleven billion, five hundred twenty-one million, two hundred fourteen thousand, five hundred forty-five".