56781694523 has 2 divisors, whose sum is σ = 56781694524. Its totient is φ = 56781694522.

The previous prime is 56781694517. The next prime is 56781694553. The reversal of 56781694523 is 32549618765.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56781694523 - 2⁴ = 56781694507 is a prime.

It is a Sophie Germain prime.

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

It is not a weakly prime, because it can be changed into another prime (56781694553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28390847261 + 28390847262.

It is an arithmetic number, because the mean of its divisors is an integer number (28390847262).

Almost surely, 2^56781694523 is an apocalyptic number.

56781694523 is a deficient number, since it is larger than the sum of its proper divisors (1).

56781694523 is an equidigital number, since it uses as much as digits as its factorization.

56781694523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10886400, while the sum is 56.

The spelling of 56781694523 in words is "fifty-six billion, seven hundred eighty-one million, six hundred ninety-four thousand, five hundred twenty-three".