645041061322 has 32 divisors (see below), whose sum is σ = 1144126425600. Its totient is φ = 266864252928.

The previous prime is 645041061257. The next prime is 645041061323. The reversal of 645041061322 is 223160140546.

It is not an unprimeable number, because it can be changed into a prime (645041061323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2096778 + ... + 2384650.

It is an arithmetic number, because the mean of its divisors is an integer number (35753950800).

Almost surely, 2^645041061322 is an apocalyptic number.

645041061322 is a deficient number, since it is larger than the sum of its proper divisors (499085364278).

645041061322 is a wasteful number, since it uses less digits than its factorization.

645041061322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293430.

The product of its (nonzero) digits is 34560, while the sum is 34.

The spelling of 645041061322 in words is "six hundred forty-five billion, forty-one million, sixty-one thousand, three hundred twenty-two".