961580613989 has 2 divisors, whose sum is σ = 961580613990. Its totient is φ = 961580613988.

The previous prime is 961580613979. The next prime is 961580614123. The reversal of 961580613989 is 989316085169.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 925748016964 + 35832597025 = 962158^2 + 189295^2 .

It is an emirp because it is prime and its reverse (989316085169) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 961580613989 - 2³² = 957285646693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (961580613949) 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, 480790306994 + 480790306995.

It is an arithmetic number, because the mean of its divisors is an integer number (480790306995).

Almost surely, 2^961580613989 is an apocalyptic number.

It is an amenable number.

961580613989 is a deficient number, since it is larger than the sum of its proper divisors (1).

961580613989 is an equidigital number, since it uses as much as digits as its factorization.

961580613989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25194240, while the sum is 65.

The spelling of 961580613989 in words is "nine hundred sixty-one billion, five hundred eighty million, six hundred thirteen thousand, nine hundred eighty-nine".