61156610984317 has 2 divisors, whose sum is σ = 61156610984318. Its totient is φ = 61156610984316.

The previous prime is 61156610984309. The next prime is 61156610984459. The reversal of 61156610984317 is 71348901665116.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31108606645081 + 30048004339236 = 5577509^2 + 5481606^2 .

It is a cyclic number.

It is not a de Polignac number, because 61156610984317 - 2³ = 61156610984309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61156610984617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30578305492158 + 30578305492159.

It is an arithmetic number, because the mean of its divisors is an integer number (30578305492159).

Almost surely, 2^{61156610984317} is an apocalyptic number.

It is an amenable number.

61156610984317 is a deficient number, since it is larger than the sum of its proper divisors (1).

61156610984317 is an equidigital number, since it uses as much as digits as its factorization.

61156610984317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6531840, while the sum is 58.

The spelling of 61156610984317 in words is "sixty-one trillion, one hundred fifty-six billion, six hundred ten million, nine hundred eighty-four thousand, three hundred seventeen".