56605071649 has 16 divisors (see below), whose sum is σ = 69266534400. Its totient is φ = 45151501824.

The previous prime is 56605071599. The next prime is 56605071661. The reversal of 56605071649 is 94617050665.

It is a cyclic number.

It is not a de Polignac number, because 56605071649 - 2¹³ = 56605063457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56605071689) 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 15 ways as a sum of consecutive naturals, for example, 2661729 + ... + 2682910.

It is an arithmetic number, because the mean of its divisors is an integer number (4329158400).

Almost surely, 2^56605071649 is an apocalyptic number.

It is an amenable number.

56605071649 is a deficient number, since it is larger than the sum of its proper divisors (12661462751).

56605071649 is a wasteful number, since it uses less digits than its factorization.

56605071649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5344752.

The product of its (nonzero) digits is 1360800, while the sum is 49.

The spelling of 56605071649 in words is "fifty-six billion, six hundred five million, seventy-one thousand, six hundred forty-nine".