56783802991 has 2 divisors, whose sum is σ = 56783802992. Its totient is φ = 56783802990.

The previous prime is 56783802973. The next prime is 56783803031. The reversal of 56783802991 is 19920838765.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56783802991 - 2¹¹ = 56783800943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56783802941) 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 as a sum of consecutive naturals, namely, 28391901495 + 28391901496.

It is an arithmetic number, because the mean of its divisors is an integer number (28391901496).

Almost surely, 2^56783802991 is an apocalyptic number.

56783802991 is a deficient number, since it is larger than the sum of its proper divisors (1).

56783802991 is an equidigital number, since it uses as much as digits as its factorization.

56783802991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6531840, while the sum is 58.

The spelling of 56783802991 in words is "fifty-six billion, seven hundred eighty-three million, eight hundred two thousand, nine hundred ninety-one".