613646614221623 has 2 divisors, whose sum is σ = 613646614221624. Its totient is φ = 613646614221622.

The previous prime is 613646614221587. The next prime is 613646614221673. The reversal of 613646614221623 is 326122416646316.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 613646614221623 - 2³⁶ = 613577894744887 is a prime.

It is a super-2 number, since 2×613646614221623² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (613646614221673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306823307110811 + 306823307110812.

It is an arithmetic number, because the mean of its divisors is an integer number (306823307110812).

Almost surely, 2^{613646614221623} is an apocalyptic number.

613646614221623 is a deficient number, since it is larger than the sum of its proper divisors (1).

613646614221623 is an equidigital number, since it uses as much as digits as its factorization.

613646614221623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8957952, while the sum is 53.

The spelling of 613646614221623 in words is "six hundred thirteen trillion, six hundred forty-six billion, six hundred fourteen million, two hundred twenty-one thousand, six hundred twenty-three".