1071078989857 has 2 divisors, whose sum is σ = 1071078989858. Its totient is φ = 1071078989856.

The previous prime is 1071078989749. The next prime is 1071078989861. The reversal of 1071078989857 is 7589898701701.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 686816617536 + 384262372321 = 828744^2 + 619889^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1071078989857 is a prime.

It is a super-2 number, since 2×1071078989857² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1071078989887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 535539494928 + 535539494929.

It is an arithmetic number, because the mean of its divisors is an integer number (535539494929).

Almost surely, 2^{1071078989857} is an apocalyptic number.

It is an amenable number.

1071078989857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1071078989857 is an equidigital number, since it uses as much as digits as its factorization.

1071078989857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 71124480, while the sum is 70.

The spelling of 1071078989857 in words is "one trillion, seventy-one billion, seventy-eight million, nine hundred eighty-nine thousand, eight hundred fifty-seven".