12640575878 has 8 divisors (see below), whose sum is σ = 21669558672. Its totient is φ = 5417389656.

The previous prime is 12640575877. The next prime is 12640575901. The reversal of 12640575878 is 87857504621.

It is a sphenic number, since it is the product of 3 distinct 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 (12640575877) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 451449125 + ... + 451449152.

It is an arithmetic number, because the mean of its divisors is an integer number (2708694834).

Almost surely, 2^12640575878 is an apocalyptic number.

12640575878 is a deficient number, since it is larger than the sum of its proper divisors (9028982794).

12640575878 is an equidigital number, since it uses as much as digits as its factorization.

12640575878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902898286.

The product of its (nonzero) digits is 3763200, while the sum is 53.

The spelling of 12640575878 in words is "twelve billion, six hundred forty million, five hundred seventy-five thousand, eight hundred seventy-eight".