345312125729 has 4 divisors (see below), whose sum is σ = 353734372740. Its totient is φ = 336889878720.

The previous prime is 345312125707. The next prime is 345312125747. The reversal of 345312125729 is 927521213543.

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

It can be written as a sum of positive squares in 2 ways, for example, as 67562045329 + 277750080400 = 259927^2 + 527020^2 .

It is a cyclic number.

It is not a de Polignac number, because 345312125729 - 2³⁶ = 276592648993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 345312125729.

It is not an unprimeable number, because it can be changed into a prime (345312121729) 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, 4211123444 + ... + 4211123525.

It is an arithmetic number, because the mean of its divisors is an integer number (88433593185).

Almost surely, 2^345312125729 is an apocalyptic number.

It is an amenable number.

345312125729 is a deficient number, since it is larger than the sum of its proper divisors (8422247011).

345312125729 is an equidigital number, since it uses as much as digits as its factorization.

345312125729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8422247010.

The product of its digits is 453600, while the sum is 44.

The spelling of 345312125729 in words is "three hundred forty-five billion, three hundred twelve million, one hundred twenty-five thousand, seven hundred twenty-nine".