645885760186 has 8 divisors (see below), whose sum is σ = 968838455520. Its totient is φ = 322939608348.

The previous prime is 645885760111. The next prime is 645885760229. The reversal of 645885760186 is 681067588546.

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

It is a super-2 number, since 2×645885760186² (a number of 24 digits) contains 22 as substring.

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, 1381176 + ... + 1788691.

It is an arithmetic number, because the mean of its divisors is an integer number (121104806940).

Almost surely, 2^645885760186 is an apocalyptic number.

645885760186 is a deficient number, since it is larger than the sum of its proper divisors (322952695334).

645885760186 is a wasteful number, since it uses less digits than its factorization.

645885760186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3271748.

The product of its (nonzero) digits is 77414400, while the sum is 64.

The spelling of 645885760186 in words is "six hundred forty-five billion, eight hundred eighty-five million, seven hundred sixty thousand, one hundred eighty-six".