56538746819 has 2 divisors, whose sum is σ = 56538746820. Its totient is φ = 56538746818.

The previous prime is 56538746801. The next prime is 56538746881. The reversal of 56538746819 is 91864783565.

It is an a-pointer prime, because the next prime (56538746881) can be obtained adding 56538746819 to its sum of digits (62).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56538746819 is a prime.

It is a super-2 number, since 2×56538746819² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (56538745819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28269373409 + 28269373410.

It is an arithmetic number, because the mean of its divisors is an integer number (28269373410).

Almost surely, 2^56538746819 is an apocalyptic number.

56538746819 is a deficient number, since it is larger than the sum of its proper divisors (1).

56538746819 is an equidigital number, since it uses as much as digits as its factorization.

56538746819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43545600, while the sum is 62.

The spelling of 56538746819 in words is "fifty-six billion, five hundred thirty-eight million, seven hundred forty-six thousand, eight hundred nineteen".