645770354 has 8 divisors (see below), whose sum is σ = 968945328. Its totient is φ = 322788580.

The previous prime is 645770327. The next prime is 645770369. The reversal of 645770354 is 453077546.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39632 + ... + 53499.

It is an arithmetic number, because the mean of its divisors is an integer number (121118166).

Almost surely, 2^645770354 is an apocalyptic number.

645770354 is a deficient number, since it is larger than the sum of its proper divisors (323174974).

645770354 is a wasteful number, since it uses less digits than its factorization.

645770354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96600.

The product of its (nonzero) digits is 352800, while the sum is 41.

The square root of 645770354 is about 25412.0120022008. The cubic root of 645770354 is about 864.3560998187.

The spelling of 645770354 in words is "six hundred forty-five million, seven hundred seventy thousand, three hundred fifty-four".