1996158961 has 2 divisors, whose sum is σ = 1996158962. Its totient is φ = 1996158960.

The previous prime is 1996158929. The next prime is 1996158973. The reversal of 1996158961 is 1698516991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1979805025 + 16353936 = 44495^2 + 4044^2 .

It is a cyclic number.

It is not a de Polignac number, because 1996158961 - 2⁵ = 1996158929 is a prime.

It is not a weakly prime, because it can be changed into another prime (1996858961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 998079480 + 998079481.

It is an arithmetic number, because the mean of its divisors is an integer number (998079481).

Almost surely, 2^1996158961 is an apocalyptic number.

It is an amenable number.

1996158961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1996158961 is an equidigital number, since it uses as much as digits as its factorization.

1996158961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1049760, while the sum is 55.

The square root of 1996158961 is about 44678.3947898758. The cubic root of 1996158961 is about 1259.1139653520.

The spelling of 1996158961 in words is "one billion, nine hundred ninety-six million, one hundred fifty-eight thousand, nine hundred sixty-one".