68641355 has 4 divisors (see below), whose sum is σ = 82369632. Its totient is φ = 54913080.

The previous prime is 68641351. The next prime is 68641387. The reversal of 68641355 is 55314686.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 68641355 - 2² = 68641351 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68641351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6864131 + ... + 6864140.

It is an arithmetic number, because the mean of its divisors is an integer number (20592408).

Almost surely, 2^68641355 is an apocalyptic number.

68641355 is a deficient number, since it is larger than the sum of its proper divisors (13728277).

68641355 is a wasteful number, since it uses less digits than its factorization.

68641355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13728276.

The product of its digits is 86400, while the sum is 38.

The square root of 68641355 is about 8285.0078455002. The cubic root of 68641355 is about 409.4447272019. Note that the first 3 decimals are identical.

The spelling of 68641355 in words is "sixty-eight million, six hundred forty-one thousand, three hundred fifty-five".