1071257571361 has 4 divisors (see below), whose sum is σ = 1071312411924. Its totient is φ = 1071202730800.

The previous prime is 1071257571353. The next prime is 1071257571389. The reversal of 1071257571361 is 1631757521701.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 328117024225 + 743140547136 = 572815^2 + 862056^2 .

It is a cyclic number.

It is not a de Polignac number, because 1071257571361 - 2³ = 1071257571353 is a prime.

It is a super-2 number, since 2×1071257571361² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1071257571331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27390970 + ... + 27430051.

It is an arithmetic number, because the mean of its divisors is an integer number (267828102981).

Almost surely, 2^{1071257571361} is an apocalyptic number.

It is an amenable number.

1071257571361 is a deficient number, since it is larger than the sum of its proper divisors (54840563).

1071257571361 is an equidigital number, since it uses as much as digits as its factorization.

1071257571361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54840562.

The product of its (nonzero) digits is 308700, while the sum is 46.

The spelling of 1071257571361 in words is "one trillion, seventy-one billion, two hundred fifty-seven million, five hundred seventy-one thousand, three hundred sixty-one".