12154517551 has 8 divisors (see below), whose sum is σ = 13260288384. Its totient is φ = 11048882520.

The previous prime is 12154517539. The next prime is 12154517561. The reversal of 12154517551 is 15571545121.

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

It is a cyclic number.

It is not a de Polignac number, because 12154517551 - 2⁵ = 12154517519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12154517551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12154517521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 277326 + ... + 318148.

It is an arithmetic number, because the mean of its divisors is an integer number (1657536048).

Almost surely, 2^12154517551 is an apocalyptic number.

12154517551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12154517551 is a deficient number, since it is larger than the sum of its proper divisors (1105770833).

12154517551 is a wasteful number, since it uses less digits than its factorization.

12154517551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67901.

The product of its digits is 35000, while the sum is 37.

The spelling of 12154517551 in words is "twelve billion, one hundred fifty-four million, five hundred seventeen thousand, five hundred fifty-one".