1117256857081 has 8 divisors (see below), whose sum is σ = 1193830858440. Its totient is φ = 1041888745728.

The previous prime is 1117256857033. The next prime is 1117256857141. The reversal of 1117256857081 is 1807586527111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 184950743481 + 932306113600 = 430059^2 + 965560^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1117256857081 - 2¹³ = 1117256848889 is a prime.

It is a super-2 number, since 2×1117256857081² (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 (1117256857681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 301470586 + ... + 301474291.

It is an arithmetic number, because the mean of its divisors is an integer number (149228857305).

Almost surely, 2^{1117256857081} is an apocalyptic number.

It is an amenable number.

1117256857081 is a deficient number, since it is larger than the sum of its proper divisors (76574001359).

1117256857081 is a wasteful number, since it uses less digits than its factorization.

1117256857081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602945003.

The product of its (nonzero) digits is 940800, while the sum is 52.

The spelling of 1117256857081 in words is "one trillion, one hundred seventeen billion, two hundred fifty-six million, eight hundred fifty-seven thousand, eighty-one".