36161971661 has 2 divisors, whose sum is σ = 36161971662. Its totient is φ = 36161971660.

The previous prime is 36161971649. The next prime is 36161971663. The reversal of 36161971661 is 16617916163.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30586512100 + 5575459561 = 174890^2 + 74669^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36161971661 is a prime.

It is a super-3 number, since 3×36161971661³ (a number of 33 digits) contains 333 as substring.

Together with 36161971663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36161971663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18080985830 + 18080985831.

It is an arithmetic number, because the mean of its divisors is an integer number (18080985831).

Almost surely, 2^36161971661 is an apocalyptic number.

It is an amenable number.

36161971661 is a deficient number, since it is larger than the sum of its proper divisors (1).

36161971661 is an equidigital number, since it uses as much as digits as its factorization.

36161971661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 47.

The spelling of 36161971661 in words is "thirty-six billion, one hundred sixty-one million, nine hundred seventy-one thousand, six hundred sixty-one".