61617171337 has 2 divisors, whose sum is σ = 61617171338. Its totient is φ = 61617171336.

The previous prime is 61617171311. The next prime is 61617171349. The reversal of 61617171337 is 73317171616.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59409675081 + 2207496256 = 243741^2 + 46984^2 .

It is a cyclic number.

It is not a de Polignac number, because 61617171337 - 2¹⁹ = 61616647049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61617171293 and 61617171302.

It is not a weakly prime, because it can be changed into another prime (61617171037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30808585668 + 30808585669.

It is an arithmetic number, because the mean of its divisors is an integer number (30808585669).

Almost surely, 2^61617171337 is an apocalyptic number.

It is an amenable number.

61617171337 is a deficient number, since it is larger than the sum of its proper divisors (1).

61617171337 is an equidigital number, since it uses as much as digits as its factorization.

61617171337 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 111132, while the sum is 43.

The spelling of 61617171337 in words is "sixty-one billion, six hundred seventeen million, one hundred seventy-one thousand, three hundred thirty-seven".