68621367355 has 4 divisors (see below), whose sum is σ = 82345640832. Its totient is φ = 54897093880.

The previous prime is 68621367349. The next prime is 68621367359. The reversal of 68621367355 is 55376312686.

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

It is not a de Polignac number, because 68621367355 - 2⁹ = 68621366843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68621367359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6862136731 + ... + 6862136740.

It is an arithmetic number, because the mean of its divisors is an integer number (20586410208).

Almost surely, 2^68621367355 is an apocalyptic number.

68621367355 is a deficient number, since it is larger than the sum of its proper divisors (13724273477).

68621367355 is a wasteful number, since it uses less digits than its factorization.

68621367355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13724273476.

The product of its digits is 5443200, while the sum is 52.

The spelling of 68621367355 in words is "sixty-eight billion, six hundred twenty-one million, three hundred sixty-seven thousand, three hundred fifty-five".