61115108969 has 2 divisors, whose sum is σ = 61115108970. Its totient is φ = 61115108968.

The previous prime is 61115108959. The next prime is 61115109007. The reversal of 61115108969 is 96980151116.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44451397225 + 16663711744 = 210835^2 + 129088^2 .

It is a cyclic number.

It is not a de Polignac number, because 61115108969 - 2³² = 56820141673 is a prime.

It is a super-3 number, since 3×61115108969³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (61115108959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30557554484 + 30557554485.

It is an arithmetic number, because the mean of its divisors is an integer number (30557554485).

Almost surely, 2^61115108969 is an apocalyptic number.

It is an amenable number.

61115108969 is a deficient number, since it is larger than the sum of its proper divisors (1).

61115108969 is an equidigital number, since it uses as much as digits as its factorization.

61115108969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 47.

The spelling of 61115108969 in words is "sixty-one billion, one hundred fifteen million, one hundred eight thousand, nine hundred sixty-nine".