15669684061 has 2 divisors, whose sum is σ = 15669684062. Its totient is φ = 15669684060.

The previous prime is 15669684031. The next prime is 15669684067. The reversal of 15669684061 is 16048696651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15038116900 + 631567161 = 122630^2 + 25131^2 .

It is a cyclic number.

It is not a de Polignac number, because 15669684061 - 2⁵ = 15669684029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15669684067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7834842030 + 7834842031.

It is an arithmetic number, because the mean of its divisors is an integer number (7834842031).

Almost surely, 2^15669684061 is an apocalyptic number.

It is an amenable number.

15669684061 is a deficient number, since it is larger than the sum of its proper divisors (1).

15669684061 is an equidigital number, since it uses as much as digits as its factorization.

15669684061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1866240, while the sum is 52.

The spelling of 15669684061 in words is "fifteen billion, six hundred sixty-nine million, six hundred eighty-four thousand, sixty-one".