345182520509 has 16 divisors (see below), whose sum is σ = 353811898368. Its totient is φ = 336608410992.

The previous prime is 345182520503. The next prime is 345182520541. The reversal of 345182520509 is 905025281543.

It is a cyclic number.

It is not a de Polignac number, because 345182520509 - 2³² = 340887553213 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 345182520509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345182520503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20051984 + ... + 20069190.

It is an arithmetic number, because the mean of its divisors is an integer number (22113243648).

Almost surely, 2^345182520509 is an apocalyptic number.

It is an amenable number.

345182520509 is a deficient number, since it is larger than the sum of its proper divisors (8629377859).

345182520509 is a wasteful number, since it uses less digits than its factorization.

345182520509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18784.

The product of its (nonzero) digits is 432000, while the sum is 44.

The spelling of 345182520509 in words is "three hundred forty-five billion, one hundred eighty-two million, five hundred twenty thousand, five hundred nine".