68955553 has 4 divisors (see below), whose sum is σ = 73011780. Its totient is φ = 64899328.

The previous prime is 68955547. The next prime is 68955571. The reversal of 68955553 is 35555986.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35555986 = 2 ⋅17777993.

It can be written as a sum of positive squares in 2 ways, for example, as 33039504 + 35916049 = 5748^2 + 5993^2 .

It is a cyclic number.

It is not a de Polignac number, because 68955553 - 2⁵ = 68955521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68955583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2028088 + ... + 2028121.

It is an arithmetic number, because the mean of its divisors is an integer number (18252945).

Almost surely, 2^68955553 is an apocalyptic number.

It is an amenable number.

68955553 is a deficient number, since it is larger than the sum of its proper divisors (4056227).

68955553 is a wasteful number, since it uses less digits than its factorization.

68955553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4056226.

The product of its digits is 810000, while the sum is 46.

The square root of 68955553 is about 8303.9480369280. The cubic root of 68955553 is about 410.0685053090.

The spelling of 68955553 in words is "sixty-eight million, nine hundred fifty-five thousand, five hundred fifty-three".