8623519191601 has 2 divisors, whose sum is σ = 8623519191602. Its totient is φ = 8623519191600.

The previous prime is 8623519191589. The next prime is 8623519191643. The reversal of 8623519191601 is 1061919153268.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6374716032400 + 2248803159201 = 2524820^2 + 1499601^2 .

It is a cyclic number.

It is not a de Polignac number, because 8623519191601 - 2²¹ = 8623517094449 is a prime.

It is not a weakly prime, because it can be changed into another prime (8623519191401) 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, 4311759595800 + 4311759595801.

It is an arithmetic number, because the mean of its divisors is an integer number (4311759595801).

Almost surely, 2^{8623519191601} is an apocalyptic number.

It is an amenable number.

8623519191601 is a deficient number, since it is larger than the sum of its proper divisors (1).

8623519191601 is an equidigital number, since it uses as much as digits as its factorization.

8623519191601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 699840, while the sum is 52.

The spelling of 8623519191601 in words is "eight trillion, six hundred twenty-three billion, five hundred nineteen million, one hundred ninety-one thousand, six hundred one".