56640273231 has 8 divisors (see below), whose sum is σ = 75522167424. Its totient is φ = 37759280600.

The previous prime is 56640273199. The next prime is 56640273281. The reversal of 56640273231 is 13237204665.

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 56640273231 - 2⁵ = 56640273199 is a prime.

It is a super-2 number, since 2×56640273231² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 56640273231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56640273281) 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, 61845 + ... + 342206.

It is an arithmetic number, because the mean of its divisors is an integer number (9440270928).

Almost surely, 2^56640273231 is an apocalyptic number.

56640273231 is a deficient number, since it is larger than the sum of its proper divisors (18881894193).

56640273231 is a wasteful number, since it uses less digits than its factorization.

56640273231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450781.

The product of its (nonzero) digits is 181440, while the sum is 39.

Adding to 56640273231 its reverse (13237204665), we get a palindrome (69877477896).

The spelling of 56640273231 in words is "fifty-six billion, six hundred forty million, two hundred seventy-three thousand, two hundred thirty-one".