16656515251 has 2 divisors, whose sum is σ = 16656515252. Its totient is φ = 16656515250.

The previous prime is 16656515237. The next prime is 16656515261. The reversal of 16656515251 is 15251565661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16656515251 - 2¹⁷ = 16656384179 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16656515198 and 16656515207.

It is not a weakly prime, because it can be changed into another prime (16656515261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8328257625 + 8328257626.

It is an arithmetic number, because the mean of its divisors is an integer number (8328257626).

Almost surely, 2^16656515251 is an apocalyptic number.

16656515251 is a deficient number, since it is larger than the sum of its proper divisors (1).

16656515251 is an equidigital number, since it uses as much as digits as its factorization.

16656515251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 270000, while the sum is 43.

The spelling of 16656515251 in words is "sixteen billion, six hundred fifty-six million, five hundred fifteen thousand, two hundred fifty-one".