78708071551 has 2 divisors, whose sum is σ = 78708071552. Its totient is φ = 78708071550.

The previous prime is 78708071513. The next prime is 78708071593. The reversal of 78708071551 is 15517080787.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78708071551 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78708071495 and 78708071504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78708072551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39354035775 + 39354035776.

It is an arithmetic number, because the mean of its divisors is an integer number (39354035776).

Almost surely, 2^78708071551 is an apocalyptic number.

78708071551 is a deficient number, since it is larger than the sum of its proper divisors (1).

78708071551 is an equidigital number, since it uses as much as digits as its factorization.

78708071551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 548800, while the sum is 49.

The spelling of 78708071551 in words is "seventy-eight billion, seven hundred eight million, seventy-one thousand, five hundred fifty-one".