16725651109 has 2 divisors, whose sum is σ = 16725651110. Its totient is φ = 16725651108.

The previous prime is 16725651097. The next prime is 16725651181. The reversal of 16725651109 is 90115652761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16532302084 + 193349025 = 128578^2 + 13905^2 .

It is a cyclic number.

It is not a de Polignac number, because 16725651109 - 2⁵ = 16725651077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16725651809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8362825554 + 8362825555.

It is an arithmetic number, because the mean of its divisors is an integer number (8362825555).

Almost surely, 2^16725651109 is an apocalyptic number.

It is an amenable number.

16725651109 is a deficient number, since it is larger than the sum of its proper divisors (1).

16725651109 is an equidigital number, since it uses as much as digits as its factorization.

16725651109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 113400, while the sum is 43.

The spelling of 16725651109 in words is "sixteen billion, seven hundred twenty-five million, six hundred fifty-one thousand, one hundred nine".