56567654321 has 4 divisors (see below), whose sum is σ = 56587852644. Its totient is φ = 56547456000.

The previous prime is 56567654261. The next prime is 56567654347. The reversal of 56567654321 is 12345676565.

It is a happy number.

56567654321 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36810259600 + 19757394721 = 191860^2 + 140561^2 .

It is a cyclic number.

It is not a de Polignac number, because 56567654321 - 2⁶ = 56567654257 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56567654321.

It is not an unprimeable number, because it can be changed into a prime (56567654021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10094960 + ... + 10100561.

It is an arithmetic number, because the mean of its divisors is an integer number (14146963161).

Almost surely, 2^56567654321 is an apocalyptic number.

It is an amenable number.

56567654321 is a deficient number, since it is larger than the sum of its proper divisors (20198323).

56567654321 is a wasteful number, since it uses less digits than its factorization.

56567654321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20198322.

The product of its digits is 4536000, while the sum is 50.

The spelling of 56567654321 in words is "fifty-six billion, five hundred sixty-seven million, six hundred fifty-four thousand, three hundred twenty-one".