56556738405 has 64 divisors (see below), whose sum is σ = 106640064000. Its totient is φ = 28341181440.

The previous prime is 56556738377. The next prime is 56556738437. The reversal of 56556738405 is 50483765565.

It is a happy number.

56556738405 is a `hidden beast` number, since 5 + 6 + 5 + 567 + 38 + 40 + 5 = 666.

It is not a de Polignac number, because 56556738405 - 2¹² = 56556734309 is a prime.

It is a super-3 number, since 3×56556738405³ (a number of 33 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 1354135 + ... + 1395275.

It is an arithmetic number, because the mean of its divisors is an integer number (1666251000).

Almost surely, 2^56556738405 is an apocalyptic number.

It is an amenable number.

56556738405 is a deficient number, since it is larger than the sum of its proper divisors (50083325595).

56556738405 is a wasteful number, since it uses less digits than its factorization.

56556738405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41771 (or 41765 counting only the distinct ones).

The product of its (nonzero) digits is 15120000, while the sum is 54.

The spelling of 56556738405 in words is "fifty-six billion, five hundred fifty-six million, seven hundred thirty-eight thousand, four hundred five".