68761019651 has 2 divisors, whose sum is σ = 68761019652. Its totient is φ = 68761019650.

The previous prime is 68761019573. The next prime is 68761019689. The reversal of 68761019651 is 15691016786.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68761019651 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68761019651.

It is not a weakly prime, because it can be changed into another prime (68761019051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34380509825 + 34380509826.

It is an arithmetic number, because the mean of its divisors is an integer number (34380509826).

Almost surely, 2^68761019651 is an apocalyptic number.

68761019651 is a deficient number, since it is larger than the sum of its proper divisors (1).

68761019651 is an equidigital number, since it uses as much as digits as its factorization.

68761019651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 50.

The spelling of 68761019651 in words is "sixty-eight billion, seven hundred sixty-one million, nineteen thousand, six hundred fifty-one".