61117171133 has 2 divisors, whose sum is σ = 61117171134. Its totient is φ = 61117171132.

The previous prime is 61117171109. The next prime is 61117171147. The reversal of 61117171133 is 33117171116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41460289924 + 19656881209 = 203618^2 + 140203^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61117171133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61117171133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61117171183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30558585566 + 30558585567.

It is an arithmetic number, because the mean of its divisors is an integer number (30558585567).

Almost surely, 2^61117171133 is an apocalyptic number.

It is an amenable number.

61117171133 is a deficient number, since it is larger than the sum of its proper divisors (1).

61117171133 is an equidigital number, since it uses as much as digits as its factorization.

61117171133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2646, while the sum is 32.

The spelling of 61117171133 in words is "sixty-one billion, one hundred seventeen million, one hundred seventy-one thousand, one hundred thirty-three".