10978311161 has 2 divisors, whose sum is σ = 10978311162. Its totient is φ = 10978311160.

The previous prime is 10978311143. The next prime is 10978311247. The reversal of 10978311161 is 16111387901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10898316025 + 79995136 = 104395^2 + 8944^2 .

It is a cyclic number.

It is not a de Polignac number, because 10978311161 - 2¹⁰ = 10978310137 is a prime.

It is not a weakly prime, because it can be changed into another prime (10978311121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5489155580 + 5489155581.

It is an arithmetic number, because the mean of its divisors is an integer number (5489155581).

Almost surely, 2^10978311161 is an apocalyptic number.

It is an amenable number.

10978311161 is a deficient number, since it is larger than the sum of its proper divisors (1).

10978311161 is an equidigital number, since it uses as much as digits as its factorization.

10978311161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 38.

The spelling of 10978311161 in words is "ten billion, nine hundred seventy-eight million, three hundred eleven thousand, one hundred sixty-one".