61020165697 has 2 divisors, whose sum is σ = 61020165698. Its totient is φ = 61020165696.

The previous prime is 61020165649. The next prime is 61020165707. The reversal of 61020165697 is 79656102016.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55471554576 + 5548611121 = 235524^2 + 74489^2 .

It is a cyclic number.

It is not a de Polignac number, because 61020165697 - 2¹¹ = 61020163649 is a prime.

It is not a weakly prime, because it can be changed into another prime (61020165797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30510082848 + 30510082849.

It is an arithmetic number, because the mean of its divisors is an integer number (30510082849).

Almost surely, 2^61020165697 is an apocalyptic number.

It is an amenable number.

61020165697 is a deficient number, since it is larger than the sum of its proper divisors (1).

61020165697 is an equidigital number, since it uses as much as digits as its factorization.

61020165697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 43.

The spelling of 61020165697 in words is "sixty-one billion, twenty million, one hundred sixty-five thousand, six hundred ninety-seven".