1181707802857 has 2 divisors, whose sum is σ = 1181707802858. Its totient is φ = 1181707802856.

The previous prime is 1181707802837. The next prime is 1181707802897. The reversal of 1181707802857 is 7582087071811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1172533802896 + 9173999961 = 1082836^2 + 95781^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1181707802857 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1181707802798 and 1181707802807.

It is not a weakly prime, because it can be changed into another prime (1181707802837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 590853901428 + 590853901429.

It is an arithmetic number, because the mean of its divisors is an integer number (590853901429).

Almost surely, 2^{1181707802857} is an apocalyptic number.

It is an amenable number.

1181707802857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1181707802857 is an equidigital number, since it uses as much as digits as its factorization.

1181707802857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1756160, while the sum is 55.

The spelling of 1181707802857 in words is "one trillion, one hundred eighty-one billion, seven hundred seven million, eight hundred two thousand, eight hundred fifty-seven".