68766213643 has 4 divisors (see below), whose sum is σ = 70443438408. Its totient is φ = 67088988880.

The previous prime is 68766213583. The next prime is 68766213709. The reversal of 68766213643 is 34631266786.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34631266786 = 2 ⋅17315633393.

It is a cyclic number.

It is not a de Polignac number, because 68766213643 - 2²⁵ = 68732659211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68766213143) 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, 838612321 + ... + 838612402.

It is an arithmetic number, because the mean of its divisors is an integer number (17610859602).

Almost surely, 2^68766213643 is an apocalyptic number.

68766213643 is a deficient number, since it is larger than the sum of its proper divisors (1677224765).

68766213643 is a wasteful number, since it uses less digits than its factorization.

68766213643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1677224764.

The product of its digits is 5225472, while the sum is 52.

The spelling of 68766213643 in words is "sixty-eight billion, seven hundred sixty-six million, two hundred thirteen thousand, six hundred forty-three".