68621355 has 24 divisors (see below), whose sum is σ = 129757680. Its totient is φ = 33270720.

The previous prime is 68621327. The next prime is 68621393. The reversal of 68621355 is 55312686.

It is not a de Polignac number, because 68621355 - 2⁹ = 68620843 is a prime.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 68820 + ... + 69809.

It is an arithmetic number, because the mean of its divisors is an integer number (5406570).

Almost surely, 2^68621355 is an apocalyptic number.

68621355 is a deficient number, since it is larger than the sum of its proper divisors (61136325).

68621355 is a wasteful number, since it uses less digits than its factorization.

68621355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138651 (or 138648 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 68621355 is about 8283.8007581061. The cubic root of 68621355 is about 409.4049567651.

The spelling of 68621355 in words is "sixty-eight million, six hundred twenty-one thousand, three hundred fifty-five".