645670174 has 16 divisors (see below), whose sum is σ = 982472976. Its totient is φ = 318208000.

The previous prime is 645670171. The next prime is 645670189. The reversal of 645670174 is 471076546.

645670174 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645670171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38814 + ... + 52894.

It is an arithmetic number, because the mean of its divisors is an integer number (61404561).

Almost surely, 2^645670174 is an apocalyptic number.

645670174 is a deficient number, since it is larger than the sum of its proper divisors (336802802).

645670174 is a wasteful number, since it uses less digits than its factorization.

645670174 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14411.

The product of its (nonzero) digits is 141120, while the sum is 40.

The square root of 645670174 is about 25410.0408106717. The cubic root of 645670174 is about 864.3114009194.

The spelling of 645670174 in words is "six hundred forty-five million, six hundred seventy thousand, one hundred seventy-four".