780342345129 has 4 divisors (see below), whose sum is σ = 1040456460176. Its totient is φ = 520228230084.

The previous prime is 780342345077. The next prime is 780342345131. The reversal of 780342345129 is 921543243087.

780342345129 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 780342345129 - 2⁷ = 780342345001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (780342345179) 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, 130057057519 + ... + 130057057524.

It is an arithmetic number, because the mean of its divisors is an integer number (260114115044).

Almost surely, 2^780342345129 is an apocalyptic number.

It is an amenable number.

780342345129 is a deficient number, since it is larger than the sum of its proper divisors (260114115047).

780342345129 is a wasteful number, since it uses less digits than its factorization.

780342345129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260114115046.

The product of its (nonzero) digits is 1451520, while the sum is 48.

The spelling of 780342345129 in words is "seven hundred eighty billion, three hundred forty-two million, three hundred forty-five thousand, one hundred twenty-nine".