11071243157 has 4 divisors (see below), whose sum is σ = 11922877260. Its totient is φ = 10219609056.

The previous prime is 11071243147. The next prime is 11071243159. The reversal of 11071243157 is 75134217011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75134217011 = 7 ⋅10733459573.

It can be written as a sum of positive squares in 2 ways, for example, as 3117100561 + 7954142596 = 55831^2 + 89186^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11071243157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11071243159) 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, 425817032 + ... + 425817057.

It is an arithmetic number, because the mean of its divisors is an integer number (2980719315).

Almost surely, 2^11071243157 is an apocalyptic number.

It is an amenable number.

11071243157 is a deficient number, since it is larger than the sum of its proper divisors (851634103).

11071243157 is an equidigital number, since it uses as much as digits as its factorization.

11071243157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851634102.

The product of its (nonzero) digits is 5880, while the sum is 32.

The spelling of 11071243157 in words is "eleven billion, seventy-one million, two hundred forty-three thousand, one hundred fifty-seven".