78280170078947 has 2 divisors, whose sum is σ = 78280170078948. Its totient is φ = 78280170078946.

The previous prime is 78280170078889. The next prime is 78280170078953. The reversal of 78280170078947 is 74987007108287.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78280170078947 - 2²² = 78280165884643 is a prime.

It is a super-2 number, since 2×78280170078947² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78280170078967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39140085039473 + 39140085039474.

It is an arithmetic number, because the mean of its divisors is an integer number (39140085039474).

Almost surely, 2^{78280170078947} is an apocalyptic number.

78280170078947 is a deficient number, since it is larger than the sum of its proper divisors (1).

78280170078947 is an equidigital number, since it uses as much as digits as its factorization.

78280170078947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 88510464, while the sum is 68.

The spelling of 78280170078947 in words is "seventy-eight trillion, two hundred eighty billion, one hundred seventy million, seventy-eight thousand, nine hundred forty-seven".