645476342 has 8 divisors (see below), whose sum is σ = 1106530896. Its totient is φ = 276632712.

The previous prime is 645476339. The next prime is 645476371. The reversal of 645476342 is 243674546.

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

It is a self number, because there is not a number n which added to its sum of digits gives 645476342.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23052713 + ... + 23052740.

It is an arithmetic number, because the mean of its divisors is an integer number (138316362).

Almost surely, 2^645476342 is an apocalyptic number.

645476342 is a deficient number, since it is larger than the sum of its proper divisors (461054554).

645476342 is a wasteful number, since it uses less digits than its factorization.

645476342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46105462.

The product of its digits is 483840, while the sum is 41.

The square root of 645476342 is about 25406.2264415635. The cubic root of 645476342 is about 864.2249026930.

The spelling of 645476342 in words is "six hundred forty-five million, four hundred seventy-six thousand, three hundred forty-two".