645416266661156 has 12 divisors (see below), whose sum is σ = 1130844220552368. Its totient is φ = 322317917931912.

The previous prime is 645416266661063. The next prime is 645416266661197. The reversal of 645416266661156 is 651166662614546.

It is a junction number, because it is equal to n+sod(n) for n = 645416266661092 and 645416266661101.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 97553845946 + ... + 97553852561.

It is an arithmetic number, because the mean of its divisors is an integer number (94237018379364).

Almost surely, 2^{645416266661156} is an apocalyptic number.

It is an amenable number.

645416266661156 is a deficient number, since it is larger than the sum of its proper divisors (485427953891212).

645416266661156 is a wasteful number, since it uses less digits than its factorization.

645416266661156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195107699338 (or 195107699336 counting only the distinct ones).

The product of its digits is 223948800, while the sum is 65.

The spelling of 645416266661156 in words is "six hundred forty-five trillion, four hundred sixteen billion, two hundred sixty-six million, six hundred sixty-one thousand, one hundred fifty-six".