56378829191 has 4 divisors (see below), whose sum is σ = 56411552232. Its totient is φ = 56346106152.

The previous prime is 56378829187. The next prime is 56378829193. The reversal of 56378829191 is 19192887365.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19192887365 = 5 ⋅3838577473.

It is a cyclic number.

It is not a de Polignac number, because 56378829191 - 2² = 56378829187 is a prime.

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 56378829191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56378829193) 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, 16358936 + ... + 16362381.

It is an arithmetic number, because the mean of its divisors is an integer number (14102888058).

Almost surely, 2^56378829191 is an apocalyptic number.

56378829191 is a deficient number, since it is larger than the sum of its proper divisors (32723041).

56378829191 is a wasteful number, since it uses less digits than its factorization.

56378829191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32723040.

The product of its digits is 6531840, while the sum is 59.

The spelling of 56378829191 in words is "fifty-six billion, three hundred seventy-eight million, eight hundred twenty-nine thousand, one hundred ninety-one".