645416266661164 has 24 divisors (see below), whose sum is σ = 1131152429912400. Its totient is φ = 322229862841536.

The previous prime is 645416266661063. The next prime is 645416266661197. The reversal of 645416266661164 is 461166662614546.

It is a junction number, because it is equal to n+sod(n) for n = 645416266661096 and 645416266661105.

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, 699012334 + ... + 699935050.

It is an arithmetic number, because the mean of its divisors is an integer number (47131351246350).

Almost surely, 2^{645416266661164} is an apocalyptic number.

It is an amenable number.

645416266661164 is a deficient number, since it is larger than the sum of its proper divisors (485736163251236).

645416266661164 is a wasteful number, since it uses less digits than its factorization.

645416266661164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1181697 (or 1181695 counting only the distinct ones).

The product of its digits is 179159040, while the sum is 64.

The spelling of 645416266661164 in words is "six hundred forty-five trillion, four hundred sixteen billion, two hundred sixty-six million, six hundred sixty-one thousand, one hundred sixty-four".