78628551677593 has 2 divisors, whose sum is σ = 78628551677594. Its totient is φ = 78628551677592.

The previous prime is 78628551677537. The next prime is 78628551677677. The reversal of 78628551677593 is 39577615582687.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58520250921609 + 20108300755984 = 7649853^2 + 4484228^2 .

It is a cyclic number.

It is not a de Polignac number, because 78628551677593 - 2¹³ = 78628551669401 is a prime.

It is not a weakly prime, because it can be changed into another prime (78628551677393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39314275838796 + 39314275838797.

It is an arithmetic number, because the mean of its divisors is an integer number (39314275838797).

Almost surely, 2^{78628551677593} is an apocalyptic number.

It is an amenable number.

78628551677593 is a deficient number, since it is larger than the sum of its proper divisors (1).

78628551677593 is an equidigital number, since it uses as much as digits as its factorization.

78628551677593 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5334336000, while the sum is 79.

The spelling of 78628551677593 in words is "seventy-eight trillion, six hundred twenty-eight billion, five hundred fifty-one million, six hundred seventy-seven thousand, five hundred ninety-three".