61120819918049 has 2 divisors, whose sum is σ = 61120819918050. Its totient is φ = 61120819918048.

The previous prime is 61120819918033. The next prime is 61120819918097. The reversal of 61120819918049 is 94081991802116.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47202190048225 + 13918629869824 = 6870385^2 + 3730768^2 .

It is a cyclic number.

It is not a de Polignac number, because 61120819918049 - 2⁴ = 61120819918033 is a prime.

It is not a weakly prime, because it can be changed into another prime (61120819915049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30560409959024 + 30560409959025.

It is an arithmetic number, because the mean of its divisors is an integer number (30560409959025).

Almost surely, 2^{61120819918049} is an apocalyptic number.

It is an amenable number.

61120819918049 is a deficient number, since it is larger than the sum of its proper divisors (1).

61120819918049 is an equidigital number, since it uses as much as digits as its factorization.

61120819918049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2239488, while the sum is 59.

The spelling of 61120819918049 in words is "sixty-one trillion, one hundred twenty billion, eight hundred nineteen million, nine hundred eighteen thousand, forty-nine".