68556582551 has 2 divisors, whose sum is σ = 68556582552. Its totient is φ = 68556582550.

The previous prime is 68556582527. The next prime is 68556582569. The reversal of 68556582551 is 15528565586.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68556582551 - 2¹⁸ = 68556320407 is a prime.

It is a super-2 number, since 2×68556582551² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68556582511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34278291275 + 34278291276.

It is an arithmetic number, because the mean of its divisors is an integer number (34278291276).

Almost surely, 2^68556582551 is an apocalyptic number.

68556582551 is a deficient number, since it is larger than the sum of its proper divisors (1).

68556582551 is an equidigital number, since it uses as much as digits as its factorization.

68556582551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400000, while the sum is 56.

The spelling of 68556582551 in words is "sixty-eight billion, five hundred fifty-six million, five hundred eighty-two thousand, five hundred fifty-one".