56481689 has 4 divisors (see below), whose sum is σ = 61616400. Its totient is φ = 51346980.

The previous prime is 56481671. The next prime is 56481697. The reversal of 56481689 is 98618465.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 56481689 - 2¹⁶ = 56416153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56481289) 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 3 ways as a sum of consecutive naturals, for example, 2567339 + ... + 2567360.

It is an arithmetic number, because the mean of its divisors is an integer number (15404100).

Almost surely, 2^56481689 is an apocalyptic number.

It is an amenable number.

56481689 is a deficient number, since it is larger than the sum of its proper divisors (5134711).

56481689 is a wasteful number, since it uses less digits than its factorization.

56481689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5134710.

The product of its digits is 414720, while the sum is 47.

The square root of 56481689 is about 7515.4300608814. The cubic root of 56481689 is about 383.6800562188.

It can be divided in two parts, 5648 and 1689, that added together give a palindrome (7337).

The spelling of 56481689 in words is "fifty-six million, four hundred eighty-one thousand, six hundred eighty-nine".