12156335154509 has 128 divisors (see below), whose sum is σ = 15695223398400. Its totient is φ = 9352755320832.

The previous prime is 12156335154503. The next prime is 12156335154511. The reversal of 12156335154509 is 90545153365121.

12156335154509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12156335154509 - 2¹⁶ = 12156335088973 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12156335154503) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 18062904797 + ... + 18062905469.

It is an arithmetic number, because the mean of its divisors is an integer number (122618932800).

Almost surely, 2^{12156335154509} is an apocalyptic number.

It is an amenable number.

12156335154509 is a deficient number, since it is larger than the sum of its proper divisors (3538888243891).

12156335154509 is a wasteful number, since it uses less digits than its factorization.

12156335154509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1464 (or 1450 counting only the distinct ones).

The product of its (nonzero) digits is 2430000, while the sum is 50.

The spelling of 12156335154509 in words is "twelve trillion, one hundred fifty-six billion, three hundred thirty-five million, one hundred fifty-four thousand, five hundred nine".