15855255851 has 2 divisors, whose sum is σ = 15855255852. Its totient is φ = 15855255850.

The previous prime is 15855255733. The next prime is 15855255881.

15855255851 is nontrivially palindromic in base 10.

It is a strong prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 15855255851 - 2¹⁴ = 15855239467 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15855255851.

It is not a weakly prime, because it can be changed into another prime (15855255881) 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, 7927627925 + 7927627926.

It is an arithmetic number, because the mean of its divisors is an integer number (7927627926).

Almost surely, 2^15855255851 is an apocalyptic number.

15855255851 is a deficient number, since it is larger than the sum of its proper divisors (1).

15855255851 is an equidigital number, since it uses as much as digits as its factorization.

15855255851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2000000, while the sum is 50.

The spelling of 15855255851 in words is "fifteen billion, eight hundred fifty-five million, two hundred fifty-five thousand, eight hundred fifty-one".