68877488551 has 2 divisors, whose sum is σ = 68877488552. Its totient is φ = 68877488550.

The previous prime is 68877488549. The next prime is 68877488557. The reversal of 68877488551 is 15588477886.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68877488551 - 2¹ = 68877488549 is a prime.

Together with 68877488549, 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 (68877488557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34438744275 + 34438744276.

It is an arithmetic number, because the mean of its divisors is an integer number (34438744276).

Almost surely, 2^68877488551 is an apocalyptic number.

68877488551 is a deficient number, since it is larger than the sum of its proper divisors (1).

68877488551 is an equidigital number, since it uses as much as digits as its factorization.

68877488551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120422400, while the sum is 67.

The spelling of 68877488551 in words is "sixty-eight billion, eight hundred seventy-seven million, four hundred eighty-eight thousand, five hundred fifty-one".