12543421163115 has 16 divisors (see below), whose sum is σ = 20078891778816. Its totient is φ = 6686685314400.

The previous prime is 12543421163069. The next prime is 12543421163131. The reversal of 12543421163115 is 51136112434521.

It is not a de Polignac number, because 12543421163115 - 2⁶ = 12543421163051 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 196173591 + ... + 196237520.

It is an arithmetic number, because the mean of its divisors is an integer number (1254930736176).

Almost surely, 2^{12543421163115} is an apocalyptic number.

12543421163115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12543421163115 is a deficient number, since it is larger than the sum of its proper divisors (7535470615701).

12543421163115 is a wasteful number, since it uses less digits than its factorization.

12543421163115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392413250.

The product of its digits is 86400, while the sum is 39.

Adding to 12543421163115 its reverse (51136112434521), we get a palindrome (63679533597636).

The spelling of 12543421163115 in words is "twelve trillion, five hundred forty-three billion, four hundred twenty-one million, one hundred sixty-three thousand, one hundred fifteen".