12640804629434 has 8 divisors (see below), whose sum is σ = 18973755728928. Its totient is φ = 6316219386460.

The previous prime is 12640804629413. The next prime is 12640804629437. The reversal of 12640804629434 is 43492640804621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12640804629437) 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, 2091460352 + ... + 2091466395.

It is an arithmetic number, because the mean of its divisors is an integer number (2371719466116).

Almost surely, 2^{12640804629434} is an apocalyptic number.

12640804629434 is a deficient number, since it is larger than the sum of its proper divisors (6332951099494).

12640804629434 is a wasteful number, since it uses less digits than its factorization.

12640804629434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4182928260.

The product of its (nonzero) digits is 7962624, while the sum is 53.

The spelling of 12640804629434 in words is "twelve trillion, six hundred forty billion, eight hundred four million, six hundred twenty-nine thousand, four hundred thirty-four".