56387678365 has 4 divisors (see below), whose sum is σ = 67665214044. Its totient is φ = 45110142688.

The previous prime is 56387678323. The next prime is 56387678411.

56387678365 is nontrivially palindromic in base 10.

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 41253265881 + 15134412484 = 203109^2 + 123022^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56387678365 is a prime.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56387678297 and 56387678306.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5638767832 + ... + 5638767841.

It is an arithmetic number, because the mean of its divisors is an integer number (16916303511).

Almost surely, 2^56387678365 is an apocalyptic number.

It is an amenable number.

56387678365 is a deficient number, since it is larger than the sum of its proper divisors (11277535679).

56387678365 is a wasteful number, since it uses less digits than its factorization.

56387678365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11277535678.

The product of its digits is 152409600, while the sum is 64.

The spelling of 56387678365 in words is "fifty-six billion, three hundred eighty-seven million, six hundred seventy-eight thousand, three hundred sixty-five".