1613365555973 has 2 divisors, whose sum is σ = 1613365555974. Its totient is φ = 1613365555972.

The previous prime is 1613365555897. The next prime is 1613365555999. The reversal of 1613365555973 is 3795555633161.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1344006631969 + 269358924004 = 1159313^2 + 518998^2 .

It is a cyclic number.

It is not a de Polignac number, because 1613365555973 - 2⁸ = 1613365555717 is a prime.

It is a super-4 number, since 4×1613365555973⁴ (a number of 50 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1613365555073) 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 as a sum of consecutive naturals, namely, 806682777986 + 806682777987.

It is an arithmetic number, because the mean of its divisors is an integer number (806682777987).

Almost surely, 2^{1613365555973} is an apocalyptic number.

It is an amenable number.

1613365555973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1613365555973 is an equidigital number, since it uses as much as digits as its factorization.

1613365555973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38272500, while the sum is 59.

The spelling of 1613365555973 in words is "one trillion, six hundred thirteen billion, three hundred sixty-five million, five hundred fifty-five thousand, nine hundred seventy-three".