16426620517 has 2 divisors, whose sum is σ = 16426620518. Its totient is φ = 16426620516.

The previous prime is 16426620503. The next prime is 16426620557. The reversal of 16426620517 is 71502662461.

It is a happy number.

It is an a-pointer prime, because the next prime (16426620557) can be obtained adding 16426620517 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13548727201 + 2877893316 = 116399^2 + 53646^2 .

It is a cyclic number.

It is not a de Polignac number, because 16426620517 - 2³¹ = 14279136869 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16426620517.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16426620557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8213310258 + 8213310259.

It is an arithmetic number, because the mean of its divisors is an integer number (8213310259).

Almost surely, 2^16426620517 is an apocalyptic number.

It is an amenable number.

16426620517 is a deficient number, since it is larger than the sum of its proper divisors (1).

16426620517 is an equidigital number, since it uses as much as digits as its factorization.

16426620517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 16426620517 in words is "sixteen billion, four hundred twenty-six million, six hundred twenty thousand, five hundred seventeen".