12151151615 has 4 divisors (see below), whose sum is σ = 14581381944. Its totient is φ = 9720921288.

The previous prime is 12151151549. The next prime is 12151151711. The reversal of 12151151615 is 51615115121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12151151615 - 2¹⁰ = 12151150591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1215115157 + ... + 1215115166.

It is an arithmetic number, because the mean of its divisors is an integer number (3645345486).

Almost surely, 2^12151151615 is an apocalyptic number.

12151151615 is a deficient number, since it is larger than the sum of its proper divisors (2430230329).

12151151615 is an equidigital number, since it uses as much as digits as its factorization.

12151151615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2430230328.

The product of its digits is 1500, while the sum is 29.

Adding to 12151151615 its reverse (51615115121), we get a palindrome (63766266736).

The spelling of 12151151615 in words is "twelve billion, one hundred fifty-one million, one hundred fifty-one thousand, six hundred fifteen".