78407065417 has 2 divisors, whose sum is σ = 78407065418. Its totient is φ = 78407065416.

The previous prime is 78407065391. The next prime is 78407065433. The reversal of 78407065417 is 71456070487.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52157881161 + 26249184256 = 228381^2 + 162016^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78407065417 is a prime.

It is a super-2 number, since 2×78407065417² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78407665417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39203532708 + 39203532709.

It is an arithmetic number, because the mean of its divisors is an integer number (39203532709).

Almost surely, 2^78407065417 is an apocalyptic number.

It is an amenable number.

78407065417 is a deficient number, since it is larger than the sum of its proper divisors (1).

78407065417 is an equidigital number, since it uses as much as digits as its factorization.

78407065417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1317120, while the sum is 49.

The spelling of 78407065417 in words is "seventy-eight billion, four hundred seven million, sixty-five thousand, four hundred seventeen".