11157802281 has 6 divisors (see below), whose sum is σ = 16116825530. Its totient is φ = 7438534848.

The previous prime is 11157802259. The next prime is 11157802309. The reversal of 11157802281 is 18220875111.

11157802281 is a `hidden beast` number, since 1 + 1 + 1 + 578 + 0 + 2 + 2 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10814960025 + 342842256 = 103995^2 + 18516^2 .

It is not a de Polignac number, because 11157802281 - 2⁶ = 11157802217 is a prime.

It is a super-2 number, since 2×11157802281² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11157802181) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 619877896 + ... + 619877913.

Almost surely, 2^11157802281 is an apocalyptic number.

It is an amenable number.

11157802281 is a deficient number, since it is larger than the sum of its proper divisors (4959023249).

11157802281 is a wasteful number, since it uses less digits than its factorization.

11157802281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1239755815 (or 1239755812 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 36.

The spelling of 11157802281 in words is "eleven billion, one hundred fifty-seven million, eight hundred two thousand, two hundred eighty-one".