56729011181 has 4 divisors (see below), whose sum is σ = 59195489952. Its totient is φ = 54262532412.

The previous prime is 56729011177. The next prime is 56729011187. The reversal of 56729011181 is 18111092765.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18111092765 = 5 ⋅3622218553.

It is a cyclic number.

It is not a de Polignac number, because 56729011181 - 2² = 56729011177 is a prime.

It is a super-2 number, since 2×56729011181² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56729011187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1233239351 + ... + 1233239396.

It is an arithmetic number, because the mean of its divisors is an integer number (14798872488).

Almost surely, 2^56729011181 is an apocalyptic number.

It is an amenable number.

56729011181 is a deficient number, since it is larger than the sum of its proper divisors (2466478771).

56729011181 is a wasteful number, since it uses less digits than its factorization.

56729011181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2466478770.

The product of its (nonzero) digits is 30240, while the sum is 41.

The spelling of 56729011181 in words is "fifty-six billion, seven hundred twenty-nine million, eleven thousand, one hundred eighty-one".