78568357057 has 2 divisors, whose sum is σ = 78568357058. Its totient is φ = 78568357056.

The previous prime is 78568357001. The next prime is 78568357067. The reversal of 78568357057 is 75075386587.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77256758401 + 1311598656 = 277951^2 + 36216^2 .

It is a cyclic number.

It is not a de Polignac number, because 78568357057 - 2²³ = 78559968449 is a prime.

It is a super-4 number, since 4×78568357057⁴ (a number of 45 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78568356986 and 78568357004.

It is not a weakly prime, because it can be changed into another prime (78568357067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39284178528 + 39284178529.

It is an arithmetic number, because the mean of its divisors is an integer number (39284178529).

Almost surely, 2^78568357057 is an apocalyptic number.

It is an amenable number.

78568357057 is a deficient number, since it is larger than the sum of its proper divisors (1).

78568357057 is an equidigital number, since it uses as much as digits as its factorization.

78568357057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 49392000, while the sum is 61.

The spelling of 78568357057 in words is "seventy-eight billion, five hundred sixty-eight million, three hundred fifty-seven thousand, fifty-seven".