1207858165601 has 2 divisors, whose sum is σ = 1207858165602. Its totient is φ = 1207858165600.

The previous prime is 1207858165541. The next prime is 1207858165603. The reversal of 1207858165601 is 1065618587021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1176684732001 + 31173433600 = 1084751^2 + 176560^2 .

It is a cyclic number.

It is not a de Polignac number, because 1207858165601 - 2¹⁰ = 1207858164577 is a prime.

Together with 1207858165603, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1207858165601.

It is not a weakly prime, because it can be changed into another prime (1207858165603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 603929082800 + 603929082801.

It is an arithmetic number, because the mean of its divisors is an integer number (603929082801).

Almost surely, 2^{1207858165601} is an apocalyptic number.

It is an amenable number.

1207858165601 is a deficient number, since it is larger than the sum of its proper divisors (1).

1207858165601 is an equidigital number, since it uses as much as digits as its factorization.

1207858165601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 806400, while the sum is 50.

The spelling of 1207858165601 in words is "one trillion, two hundred seven billion, eight hundred fifty-eight million, one hundred sixty-five thousand, six hundred one".