61964614181 has 2 divisors, whose sum is σ = 61964614182. Its totient is φ = 61964614180.

The previous prime is 61964614169. The next prime is 61964614193. The reversal of 61964614181 is 18141646916.

It is a balanced prime because it is at equal distance from previous prime (61964614169) and next prime (61964614193).

It can be written as a sum of positive squares in only one way, i.e., 47119384900 + 14845229281 = 217070^2 + 121841^2 .

It is a cyclic number.

It is not a de Polignac number, because 61964614181 - 2¹⁰ = 61964613157 is a prime.

It is a super-2 number, since 2×61964614181² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61964614081) 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, 30982307090 + 30982307091.

It is an arithmetic number, because the mean of its divisors is an integer number (30982307091).

Almost surely, 2^61964614181 is an apocalyptic number.

It is an amenable number.

61964614181 is a deficient number, since it is larger than the sum of its proper divisors (1).

61964614181 is an equidigital number, since it uses as much as digits as its factorization.

61964614181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 47.

The spelling of 61964614181 in words is "sixty-one billion, nine hundred sixty-four million, six hundred fourteen thousand, one hundred eighty-one".