345406721518 has 8 divisors (see below), whose sum is σ = 519219527112. Its totient is φ = 172333545816.

The previous prime is 345406721447. The next prime is 345406721521. The reversal of 345406721518 is 815127604543.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 184906305 + ... + 184908172.

It is an arithmetic number, because the mean of its divisors is an integer number (64902440889).

Almost surely, 2^345406721518 is an apocalyptic number.

345406721518 is a deficient number, since it is larger than the sum of its proper divisors (173812805594).

345406721518 is a wasteful number, since it uses less digits than its factorization.

345406721518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369814946.

The product of its (nonzero) digits is 806400, while the sum is 46.

The spelling of 345406721518 in words is "three hundred forty-five billion, four hundred six million, seven hundred twenty-one thousand, five hundred eighteen".