12340578729134 has 4 divisors (see below), whose sum is σ = 18510868093704. Its totient is φ = 6170289364566.

The previous prime is 12340578729133. The next prime is 12340578729169. The reversal of 12340578729134 is 43192787504321.

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

It is a self number, because there is not a number n which added to its sum of digits gives 12340578729134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12340578729133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3085144682282 + ... + 3085144682285.

It is an arithmetic number, because the mean of its divisors is an integer number (4627717023426).

Almost surely, 2^{12340578729134} is an apocalyptic number.

12340578729134 is a deficient number, since it is larger than the sum of its proper divisors (6170289364570).

12340578729134 is an equidigital number, since it uses as much as digits as its factorization.

12340578729134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6170289364569.

The product of its (nonzero) digits is 10160640, while the sum is 56.

The spelling of 12340578729134 in words is "twelve trillion, three hundred forty billion, five hundred seventy-eight million, seven hundred twenty-nine thousand, one hundred thirty-four".