1656160561345 has 4 divisors (see below), whose sum is σ = 1987392673620. Its totient is φ = 1324928449072.

The previous prime is 1656160561333. The next prime is 1656160561379. The reversal of 1656160561345 is 5431650616561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 422488300081 + 1233672261264 = 649991^2 + 1110708^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1656160561345 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165616056130 + ... + 165616056139.

It is an arithmetic number, because the mean of its divisors is an integer number (496848168405).

Almost surely, 2^{1656160561345} is an apocalyptic number.

It is an amenable number.

1656160561345 is a deficient number, since it is larger than the sum of its proper divisors (331232112275).

1656160561345 is an equidigital number, since it uses as much as digits as its factorization.

1656160561345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331232112274.

The product of its (nonzero) digits is 1944000, while the sum is 49.

The spelling of 1656160561345 in words is "one trillion, six hundred fifty-six billion, one hundred sixty million, five hundred sixty-one thousand, three hundred forty-five".