16158647761 has 2 divisors, whose sum is σ = 16158647762. Its totient is φ = 16158647760.

The previous prime is 16158647707. The next prime is 16158647767. The reversal of 16158647761 is 16774685161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15920130625 + 238517136 = 126175^2 + 15444^2 .

It is a cyclic number.

It is not a de Polignac number, because 16158647761 - 2⁹ = 16158647249 is a prime.

It is a super-2 number, since 2×16158647761² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16158647699 and 16158647708.

It is not a weakly prime, because it can be changed into another prime (16158647767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8079323880 + 8079323881.

It is an arithmetic number, because the mean of its divisors is an integer number (8079323881).

Almost surely, 2^16158647761 is an apocalyptic number.

It is an amenable number.

16158647761 is a deficient number, since it is larger than the sum of its proper divisors (1).

16158647761 is an equidigital number, since it uses as much as digits as its factorization.

16158647761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1693440, while the sum is 52.

The spelling of 16158647761 in words is "sixteen billion, one hundred fifty-eight million, six hundred forty-seven thousand, seven hundred sixty-one".