56123501289 has 16 divisors (see below), whose sum is σ = 75512097024. Its totient is φ = 37075449600.

The previous prime is 56123501281. The next prime is 56123501347. The reversal of 56123501289 is 98210532165.

It is not a de Polignac number, because 56123501289 - 2³ = 56123501281 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 56123501289.

It is not an unprimeable number, because it can be changed into a prime (56123501281) 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 15 ways as a sum of consecutive naturals, for example, 1538319 + ... + 1574379.

It is an arithmetic number, because the mean of its divisors is an integer number (4719506064).

Almost surely, 2^56123501289 is an apocalyptic number.

It is an amenable number.

56123501289 is a deficient number, since it is larger than the sum of its proper divisors (19388595735).

56123501289 is a wasteful number, since it uses less digits than its factorization.

56123501289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40768.

The product of its (nonzero) digits is 129600, while the sum is 42.

The spelling of 56123501289 in words is "fifty-six billion, one hundred twenty-three million, five hundred one thousand, two hundred eighty-nine".