68554557 has 18 divisors (see below), whose sum is σ = 105194778. Its totient is φ = 43012992.

The previous prime is 68554553. The next prime is 68554561. The reversal of 68554557 is 75545586.

It is an interprime number because it is at equal distance from previous prime (68554553) and next prime (68554561).

It can be written as a sum of positive squares in 3 ways, for example, as 23677956 + 44876601 = 4866^2 + 6699^2 .

It is not a de Polignac number, because 68554557 - 2² = 68554553 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68554553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 10578 + ... + 15779.

Almost surely, 2^68554557 is an apocalyptic number.

It is an amenable number.

68554557 is a deficient number, since it is larger than the sum of its proper divisors (36640221).

68554557 is a wasteful number, since it uses less digits than its factorization.

68554557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26397 (or 26377 counting only the distinct ones).

The product of its digits is 840000, while the sum is 45.

The square root of 68554557 is about 8279.7679315304. The cubic root of 68554557 is about 409.2720714522.

The spelling of 68554557 in words is "sixty-eight million, five hundred fifty-four thousand, five hundred fifty-seven".