1656641312313 has 8 divisors (see below), whose sum is σ = 2378767012608. Its totient is φ = 1019471576784.

The previous prime is 1656641312299. The next prime is 1656641312357. The reversal of 1656641312313 is 3132131466561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1656641312313 - 2²⁹ = 1656104441401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1656641312393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21238991145 + ... + 21238991222.

It is an arithmetic number, because the mean of its divisors is an integer number (297345876576).

Almost surely, 2^{1656641312313} is an apocalyptic number.

1656641312313 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1656641312313 is a deficient number, since it is larger than the sum of its proper divisors (722125700295).

1656641312313 is a wasteful number, since it uses less digits than its factorization.

1656641312313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42477982383.

The product of its digits is 233280, while the sum is 42.

Adding to 1656641312313 its reverse (3132131466561), we get a palindrome (4788772778874).

The spelling of 1656641312313 in words is "one trillion, six hundred fifty-six billion, six hundred forty-one million, three hundred twelve thousand, three hundred thirteen".