78248596456777 has 2 divisors, whose sum is σ = 78248596456778. Its totient is φ = 78248596456776.

The previous prime is 78248596456763. The next prime is 78248596456817. The reversal of 78248596456777 is 77765469584287.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52465163104656 + 25783433352121 = 7243284^2 + 5077739^2 .

It is a cyclic number.

It is not a de Polignac number, because 78248596456777 - 2¹¹ = 78248596454729 is a prime.

It is a super-2 number, since 2×78248596456777² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78248596456694 and 78248596456703.

It is not a weakly prime, because it can be changed into another prime (78248596456757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39124298228388 + 39124298228389.

It is an arithmetic number, because the mean of its divisors is an integer number (39124298228389).

Almost surely, 2^{78248596456777} is an apocalyptic number.

It is an amenable number.

78248596456777 is a deficient number, since it is larger than the sum of its proper divisors (1).

78248596456777 is an equidigital number, since it uses as much as digits as its factorization.

78248596456777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39829708800, while the sum is 85.

The spelling of 78248596456777 in words is "seventy-eight trillion, two hundred forty-eight billion, five hundred ninety-six million, four hundred fifty-six thousand, seven hundred seventy-seven".