15809617032061 has 2 divisors, whose sum is σ = 15809617032062. Its totient is φ = 15809617032060.

The previous prime is 15809617031963. The next prime is 15809617032071. The reversal of 15809617032061 is 16023071690851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13510696976100 + 2298920055961 = 3675690^2 + 1516219^2 .

It is an emirp because it is prime and its reverse (16023071690851) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15809617032061 - 2¹¹ = 15809617030013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15809617031996 and 15809617032014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15809617032071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7904808516030 + 7904808516031.

It is an arithmetic number, because the mean of its divisors is an integer number (7904808516031).

Almost surely, 2^{15809617032061} is an apocalyptic number.

It is an amenable number.

15809617032061 is a deficient number, since it is larger than the sum of its proper divisors (1).

15809617032061 is an equidigital number, since it uses as much as digits as its factorization.

15809617032061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 49.

The spelling of 15809617032061 in words is "fifteen trillion, eight hundred nine billion, six hundred seventeen million, thirty-two thousand, sixty-one".