1081185577 has 2 divisors, whose sum is σ = 1081185578. Its totient is φ = 1081185576.

The previous prime is 1081185563. The next prime is 1081185583. The reversal of 1081185577 is 7755811801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 789834816 + 291350761 = 28104^2 + 17069^2 .

It is a cyclic number.

It is not a de Polignac number, because 1081185577 - 2²⁷ = 946967849 is a prime.

It is not a weakly prime, because it can be changed into another prime (1081185517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540592788 + 540592789.

It is an arithmetic number, because the mean of its divisors is an integer number (540592789).

Almost surely, 2^1081185577 is an apocalyptic number.

It is an amenable number.

1081185577 is a deficient number, since it is larger than the sum of its proper divisors (1).

1081185577 is an equidigital number, since it uses as much as digits as its factorization.

1081185577 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 78400, while the sum is 43.

The square root of 1081185577 is about 32881.3864823246. The cubic root of 1081185577 is about 1026.3608581495.

The spelling of 1081185577 in words is "one billion, eighty-one million, one hundred eighty-five thousand, five hundred seventy-seven".