68724046879 has 2 divisors, whose sum is σ = 68724046880. Its totient is φ = 68724046878.

The previous prime is 68724046877. The next prime is 68724046891. The reversal of 68724046879 is 97864042786.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68724046879 - 2¹ = 68724046877 is a prime.

Together with 68724046877, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68724046871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34362023439 + 34362023440.

It is an arithmetic number, because the mean of its divisors is an integer number (34362023440).

Almost surely, 2^68724046879 is an apocalyptic number.

68724046879 is a deficient number, since it is larger than the sum of its proper divisors (1).

68724046879 is an equidigital number, since it uses as much as digits as its factorization.

68724046879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32514048, while the sum is 61.

The spelling of 68724046879 in words is "sixty-eight billion, seven hundred twenty-four million, forty-six thousand, eight hundred seventy-nine".