345531645 has 48 divisors (see below), whose sum is σ = 636854400. Its totient is φ = 172917888.

The previous prime is 345531643. The next prime is 345531661. The reversal of 345531645 is 546135543.

345531645 is a `hidden beast` number, since 3 + 4 + 5 + 5 + 3 + 1 + 645 = 666.

It is not a de Polignac number, because 345531645 - 2¹ = 345531643 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345531643) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 51706 + ... + 58004.

It is an arithmetic number, because the mean of its divisors is an integer number (13267800).

Almost surely, 2^345531645 is an apocalyptic number.

It is an amenable number.

345531645 is a deficient number, since it is larger than the sum of its proper divisors (291322755).

345531645 is a wasteful number, since it uses less digits than its factorization.

345531645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6386 (or 6383 counting only the distinct ones).

The product of its digits is 108000, while the sum is 36.

The square root of 345531645 is about 18588.4815140990. The cubic root of 345531645 is about 701.7179876315.

The spelling of 345531645 in words is "three hundred forty-five million, five hundred thirty-one thousand, six hundred forty-five".