16610506513 has 2 divisors, whose sum is σ = 16610506514. Its totient is φ = 16610506512.

The previous prime is 16610506511. The next prime is 16610506519. The reversal of 16610506513 is 31560501661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15740964369 + 869542144 = 125463^2 + 29488^2 .

It is a cyclic number.

It is not a de Polignac number, because 16610506513 - 2¹ = 16610506511 is a prime.

Together with 16610506511, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (16610506511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8305253256 + 8305253257.

It is an arithmetic number, because the mean of its divisors is an integer number (8305253257).

Almost surely, 2^16610506513 is an apocalyptic number.

It is an amenable number.

16610506513 is a deficient number, since it is larger than the sum of its proper divisors (1).

16610506513 is an equidigital number, since it uses as much as digits as its factorization.

16610506513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 34.

The spelling of 16610506513 in words is "sixteen billion, six hundred ten million, five hundred six thousand, five hundred thirteen".