68515355 has 16 divisors (see below), whose sum is σ = 88288704. Its totient is φ = 50856960.

The previous prime is 68515351. The next prime is 68515361. The reversal of 68515355 is 55351586.

It is not a de Polignac number, because 68515355 - 2² = 68515351 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68515351) 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 15 ways as a sum of consecutive naturals, for example, 359 + ... + 11711.

It is an arithmetic number, because the mean of its divisors is an integer number (5518044).

Almost surely, 2^68515355 is an apocalyptic number.

68515355 is a deficient number, since it is larger than the sum of its proper divisors (19773349).

68515355 is a wasteful number, since it uses less digits than its factorization.

68515355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11446.

The product of its digits is 90000, while the sum is 38.

The square root of 68515355 is about 8277.4002561191. The cubic root of 68515355 is about 409.1940443370.

The spelling of 68515355 in words is "sixty-eight million, five hundred fifteen thousand, three hundred fifty-five".