12611578143 has 4 divisors (see below), whose sum is σ = 16815437528. Its totient is φ = 8407718760.

The previous prime is 12611578117. The next prime is 12611578153. The reversal of 12611578143 is 34187511621.

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

It is not a de Polignac number, because 12611578143 - 2¹⁰ = 12611577119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12611578153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2101929688 + ... + 2101929693.

It is an arithmetic number, because the mean of its divisors is an integer number (4203859382).

Almost surely, 2^12611578143 is an apocalyptic number.

12611578143 is a deficient number, since it is larger than the sum of its proper divisors (4203859385).

12611578143 is an equidigital number, since it uses as much as digits as its factorization.

12611578143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4203859384.

The product of its digits is 40320, while the sum is 39.

The spelling of 12611578143 in words is "twelve billion, six hundred eleven million, five hundred seventy-eight thousand, one hundred forty-three".