17955915853 has 2 divisors, whose sum is σ = 17955915854. Its totient is φ = 17955915852.

The previous prime is 17955915829. The next prime is 17955915871. The reversal of 17955915853 is 35851955971.

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., 17113349124 + 842566729 = 130818^2 + 29027^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17955915853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17955915893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8977957926 + 8977957927.

It is an arithmetic number, because the mean of its divisors is an integer number (8977957927).

Almost surely, 2^17955915853 is an apocalyptic number.

It is an amenable number.

17955915853 is a deficient number, since it is larger than the sum of its proper divisors (1).

17955915853 is an equidigital number, since it uses as much as digits as its factorization.

17955915853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8505000, while the sum is 58.

The spelling of 17955915853 in words is "seventeen billion, nine hundred fifty-five million, nine hundred fifteen thousand, eight hundred fifty-three".