56155161663 has 12 divisors (see below), whose sum is σ = 81115477768. Its totient is φ = 37435636080.

The previous prime is 56155161661. The next prime is 56155161707. The reversal of 56155161663 is 36616155165.

56155161663 is a `hidden beast` number, since 5 + 61 + 5 + 516 + 16 + 63 = 666.

It is not a de Polignac number, because 56155161663 - 2¹ = 56155161661 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 (56155161661) 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 11 ways as a sum of consecutive naturals, for example, 307281 + ... + 454677.

Almost surely, 2^56155161663 is an apocalyptic number.

56155161663 is a deficient number, since it is larger than the sum of its proper divisors (24960316105).

56155161663 is a wasteful number, since it uses less digits than its factorization.

56155161663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189734 (or 189731 counting only the distinct ones).

The product of its digits is 486000, while the sum is 45.

The spelling of 56155161663 in words is "fifty-six billion, one hundred fifty-five million, one hundred sixty-one thousand, six hundred sixty-three".