68557216495 has 16 divisors (see below), whose sum is σ = 83655440352. Its totient is φ = 53922072960.

The previous prime is 68557216433. The next prime is 68557216499. The reversal of 68557216495 is 59461275586.

It is a happy number.

It is not a de Polignac number, because 68557216495 - 2²³ = 68548827887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68557216499) 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 in 15 ways as a sum of consecutive naturals, for example, 634009 + ... + 734221.

It is an arithmetic number, because the mean of its divisors is an integer number (5228465022).

Almost surely, 2^68557216495 is an apocalyptic number.

68557216495 is a deficient number, since it is larger than the sum of its proper divisors (15098223857).

68557216495 is a wasteful number, since it uses less digits than its factorization.

68557216495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102522.

The product of its digits is 18144000, while the sum is 58.

The spelling of 68557216495 in words is "sixty-eight billion, five hundred fifty-seven million, two hundred sixteen thousand, four hundred ninety-five".