61061659503073 has 2 divisors, whose sum is σ = 61061659503074. Its totient is φ = 61061659503072.

The previous prime is 61061659503071. The next prime is 61061659503079. The reversal of 61061659503073 is 37030595616016.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61040984514129 + 20674988944 = 7812873^2 + 143788^2 .

It is a cyclic number.

It is not a de Polignac number, because 61061659503073 - 2¹ = 61061659503071 is a prime.

It is a super-2 number, since 2×61061659503073² (a number of 28 digits) contains 22 as substring.

Together with 61061659503071, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 61061659503073.

It is not a weakly prime, because it can be changed into another prime (61061659503071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30530829751536 + 30530829751537.

It is an arithmetic number, because the mean of its divisors is an integer number (30530829751537).

Almost surely, 2^{61061659503073} is an apocalyptic number.

It is an amenable number.

61061659503073 is a deficient number, since it is larger than the sum of its proper divisors (1).

61061659503073 is an equidigital number, since it uses as much as digits as its factorization.

61061659503073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3061800, while the sum is 52.

The spelling of 61061659503073 in words is "sixty-one trillion, sixty-one billion, six hundred fifty-nine million, five hundred three thousand, seventy-three".