78175410477049 has 2 divisors, whose sum is σ = 78175410477050. Its totient is φ = 78175410477048.

The previous prime is 78175410477011. The next prime is 78175410477077. The reversal of 78175410477049 is 94077401457187.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60552987296400 + 17622423180649 = 7781580^2 + 4197907^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78175410477049 is a prime.

It is a super-2 number, since 2×78175410477049² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78175410477079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39087705238524 + 39087705238525.

It is an arithmetic number, because the mean of its divisors is an integer number (39087705238525).

Almost surely, 2^{78175410477049} is an apocalyptic number.

It is an amenable number.

78175410477049 is a deficient number, since it is larger than the sum of its proper divisors (1).

78175410477049 is an equidigital number, since it uses as much as digits as its factorization.

78175410477049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55319040, while the sum is 64.

The spelling of 78175410477049 in words is "seventy-eight trillion, one hundred seventy-five billion, four hundred ten million, four hundred seventy-seven thousand, forty-nine".