645822160670 has 16 divisors (see below), whose sum is σ = 1178852846688. Its totient is φ = 254690429280.

The previous prime is 645822160651. The next prime is 645822160699. The reversal of 645822160670 is 76061228546.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 454803629 + ... + 454805048.

It is an arithmetic number, because the mean of its divisors is an integer number (73678302918).

Almost surely, 2^645822160670 is an apocalyptic number.

645822160670 is a deficient number, since it is larger than the sum of its proper divisors (533030686018).

645822160670 is a wasteful number, since it uses less digits than its factorization.

645822160670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909608755.

The product of its (nonzero) digits is 967680, while the sum is 47.

The spelling of 645822160670 in words is "six hundred forty-five billion, eight hundred twenty-two million, one hundred sixty thousand, six hundred seventy".