56166728395 has 4 divisors (see below), whose sum is σ = 67400074080. Its totient is φ = 44933382712.

The previous prime is 56166728377. The next prime is 56166728399. The reversal of 56166728395 is 59382766165.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56166728395 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56166728399) 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, 5616672835 + ... + 5616672844.

It is an arithmetic number, because the mean of its divisors is an integer number (16850018520).

Almost surely, 2^56166728395 is an apocalyptic number.

56166728395 is a deficient number, since it is larger than the sum of its proper divisors (11233345685).

56166728395 is a wasteful number, since it uses less digits than its factorization.

56166728395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11233345684.

The product of its digits is 16329600, while the sum is 58.

The spelling of 56166728395 in words is "fifty-six billion, one hundred sixty-six million, seven hundred twenty-eight thousand, three hundred ninety-five".