12511434330155 has 8 divisors (see below), whose sum is σ = 15019792266912. Its totient is φ = 10005100083648.

The previous prime is 12511434330149. The next prime is 12511434330191. The reversal of 12511434330155 is 55103343411521.

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 12511434330155 - 2¹² = 12511434326059 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 505908959 + ... + 505933688.

It is an arithmetic number, because the mean of its divisors is an integer number (1877474033364).

Almost surely, 2^{12511434330155} is an apocalyptic number.

12511434330155 is a deficient number, since it is larger than the sum of its proper divisors (2508357936757).

12511434330155 is a wasteful number, since it uses less digits than its factorization.

12511434330155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011845125.

The product of its (nonzero) digits is 108000, while the sum is 38.

Adding to 12511434330155 its reverse (55103343411521), we get a palindrome (67614777741676).

The spelling of 12511434330155 in words is "twelve trillion, five hundred eleven billion, four hundred thirty-four million, three hundred thirty thousand, one hundred fifty-five".