12581132078 has 4 divisors (see below), whose sum is σ = 18871698120. Its totient is φ = 6290566038.

The previous prime is 12581132071. The next prime is 12581132107. The reversal of 12581132078 is 87023118521.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12581132071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3145283018 + ... + 3145283021.

It is an arithmetic number, because the mean of its divisors is an integer number (4717924530).

Almost surely, 2^12581132078 is an apocalyptic number.

12581132078 is a deficient number, since it is larger than the sum of its proper divisors (6290566042).

12581132078 is an equidigital number, since it uses as much as digits as its factorization.

12581132078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6290566041.

The product of its (nonzero) digits is 26880, while the sum is 38.

The spelling of 12581132078 in words is "twelve billion, five hundred eighty-one million, one hundred thirty-two thousand, seventy-eight".