68005661363 has 4 divisors (see below), whose sum is σ = 68106710568. Its totient is φ = 67904612160.

The previous prime is 68005661249. The next prime is 68005661369. The reversal of 68005661363 is 36316650086.

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

It is a cyclic number.

It is not a de Polignac number, because 68005661363 - 2⁸ = 68005661107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68005661369) 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, 50523593 + ... + 50524938.

It is an arithmetic number, because the mean of its divisors is an integer number (17026677642).

Almost surely, 2^68005661363 is an apocalyptic number.

68005661363 is a deficient number, since it is larger than the sum of its proper divisors (101049205).

68005661363 is a wasteful number, since it uses less digits than its factorization.

68005661363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101049204.

The product of its (nonzero) digits is 466560, while the sum is 44.

The spelling of 68005661363 in words is "sixty-eight billion, five million, six hundred sixty-one thousand, three hundred sixty-three".