2664644065156 has 12 divisors (see below), whose sum is σ = 4663140876940. Its totient is φ = 1332318100320.

The previous prime is 2664644065151. The next prime is 2664644065243. The reversal of 2664644065156 is 6515604464662.

It can be written as a sum of positive squares in 2 ways, for example, as 2268084192256 + 396559872900 = 1506016^2 + 629730^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2664644065097 and 2664644065106.

It is not an unprimeable number, because it can be changed into a prime (2664644065151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 974926 + ... + 2505946.

Almost surely, 2^{2664644065156} is an apocalyptic number.

It is an amenable number.

2664644065156 is a deficient number, since it is larger than the sum of its proper divisors (1998496811784).

2664644065156 is a wasteful number, since it uses less digits than its factorization.

2664644065156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1966134 (or 1966132 counting only the distinct ones).

The product of its (nonzero) digits is 24883200, while the sum is 55.

The spelling of 2664644065156 in words is "two trillion, six hundred sixty-four billion, six hundred forty-four million, sixty-five thousand, one hundred fifty-six".