1313616565623 has 4 divisors (see below), whose sum is σ = 1751488754168. Its totient is φ = 875744377080.

The previous prime is 1313616565619. The next prime is 1313616565643. The reversal of 1313616565623 is 3265656163131.

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

It is not a de Polignac number, because 1313616565623 - 2² = 1313616565619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313616565603) 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, 218936094268 + ... + 218936094273.

It is an arithmetic number, because the mean of its divisors is an integer number (437872188542).

Almost surely, 2^{1313616565623} is an apocalyptic number.

1313616565623 is a deficient number, since it is larger than the sum of its proper divisors (437872188545).

1313616565623 is an equidigital number, since it uses as much as digits as its factorization.

1313616565623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437872188544.

The product of its digits is 1749600, while the sum is 48.

The spelling of 1313616565623 in words is "one trillion, three hundred thirteen billion, six hundred sixteen million, five hundred sixty-five thousand, six hundred twenty-three".