68648655263 has 4 divisors (see below), whose sum is σ = 68652350688. Its totient is φ = 68644959840.

The previous prime is 68648655253. The next prime is 68648655269. The reversal of 68648655263 is 36255684686.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68648655263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68648655269) 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, 1819706 + ... + 1857047.

It is an arithmetic number, because the mean of its divisors is an integer number (17163087672).

Almost surely, 2^68648655263 is an apocalyptic number.

68648655263 is a deficient number, since it is larger than the sum of its proper divisors (3695425).

68648655263 is a wasteful number, since it uses less digits than its factorization.

68648655263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3695424.

The product of its digits is 49766400, while the sum is 59.

The spelling of 68648655263 in words is "sixty-eight billion, six hundred forty-eight million, six hundred fifty-five thousand, two hundred sixty-three".