645376351466 has 32 divisors (see below), whose sum is σ = 1218887498880. Its totient is φ = 248955768000.

The previous prime is 645376351427. The next prime is 645376351471. The reversal of 645376351466 is 664153673546.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20730761 + ... + 20761868.

It is an arithmetic number, because the mean of its divisors is an integer number (38090234340).

Almost surely, 2^645376351466 is an apocalyptic number.

645376351466 is a deficient number, since it is larger than the sum of its proper divisors (573511147414).

645376351466 is a wasteful number, since it uses less digits than its factorization.

645376351466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41492750.

The product of its digits is 32659200, while the sum is 56.

The spelling of 645376351466 in words is "six hundred forty-five billion, three hundred seventy-six million, three hundred fifty-one thousand, four hundred sixty-six".