61020762161 has 2 divisors, whose sum is σ = 61020762162. Its totient is φ = 61020762160.

The previous prime is 61020762137. The next prime is 61020762163. The reversal of 61020762161 is 16126702016.

61020762161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59914800625 + 1105961536 = 244775^2 + 33256^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61020762161 is a prime.

It is a Sophie Germain prime.

Together with 61020762163, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (61020762163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30510381080 + 30510381081.

It is an arithmetic number, because the mean of its divisors is an integer number (30510381081).

Almost surely, 2^61020762161 is an apocalyptic number.

It is an amenable number.

61020762161 is a deficient number, since it is larger than the sum of its proper divisors (1).

61020762161 is an equidigital number, since it uses as much as digits as its factorization.

61020762161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 32.

The spelling of 61020762161 in words is "sixty-one billion, twenty million, seven hundred sixty-two thousand, one hundred sixty-one".