16765551653 has 2 divisors, whose sum is σ = 16765551654. Its totient is φ = 16765551652.

The previous prime is 16765551637. The next prime is 16765551679. The reversal of 16765551653 is 35615556761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8383599844 + 8381951809 = 91562^2 + 91553^2 .

It is a cyclic number.

It is not a de Polignac number, because 16765551653 - 2⁴ = 16765551637 is a prime.

It is a super-2 number, since 2×16765551653² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16765551853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8382775826 + 8382775827.

It is an arithmetic number, because the mean of its divisors is an integer number (8382775827).

Almost surely, 2^16765551653 is an apocalyptic number.

It is an amenable number.

16765551653 is a deficient number, since it is larger than the sum of its proper divisors (1).

16765551653 is an equidigital number, since it uses as much as digits as its factorization.

16765551653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2835000, while the sum is 50.

The spelling of 16765551653 in words is "sixteen billion, seven hundred sixty-five million, five hundred fifty-one thousand, six hundred fifty-three".