15972828961 has 2 divisors, whose sum is σ = 15972828962. Its totient is φ = 15972828960.

The previous prime is 15972828953. The next prime is 15972829027. The reversal of 15972828961 is 16982827951.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15667278561 + 305550400 = 125169^2 + 17480^2 .

It is an emirp because it is prime and its reverse (16982827951) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15972828961 - 2³ = 15972828953 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15972828896 and 15972828905.

It is not a weakly prime, because it can be changed into another prime (15972828901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7986414480 + 7986414481.

It is an arithmetic number, because the mean of its divisors is an integer number (7986414481).

Almost surely, 2^15972828961 is an apocalyptic number.

It is an amenable number.

15972828961 is a deficient number, since it is larger than the sum of its proper divisors (1).

15972828961 is an equidigital number, since it uses as much as digits as its factorization.

15972828961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4354560, while the sum is 58.

The spelling of 15972828961 in words is "fifteen billion, nine hundred seventy-two million, eight hundred twenty-eight thousand, nine hundred sixty-one".