1085174781077 has 2 divisors, whose sum is σ = 1085174781078. Its totient is φ = 1085174781076.

The previous prime is 1085174781023. The next prime is 1085174781127. The reversal of 1085174781077 is 7701874715801.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 964561658641 + 120613122436 = 982121^2 + 347294^2 .

It is a cyclic number.

It is not a de Polignac number, because 1085174781077 - 2⁶ = 1085174781013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1085134781077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 542587390538 + 542587390539.

It is an arithmetic number, because the mean of its divisors is an integer number (542587390539).

Almost surely, 2^{1085174781077} is an apocalyptic number.

It is an amenable number.

1085174781077 is a deficient number, since it is larger than the sum of its proper divisors (1).

1085174781077 is an equidigital number, since it uses as much as digits as its factorization.

1085174781077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3073280, while the sum is 56.

The spelling of 1085174781077 in words is "one trillion, eighty-five billion, one hundred seventy-four million, seven hundred eighty-one thousand, seventy-seven".