78183661171751 has 2 divisors, whose sum is σ = 78183661171752. Its totient is φ = 78183661171750.

The previous prime is 78183661171661. The next prime is 78183661171787. The reversal of 78183661171751 is 15717116638187.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78183661171751 - 2³⁰ = 78182587429927 is a prime.

It is a super-2 number, since 2×78183661171751² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78183661101751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39091830585875 + 39091830585876.

It is an arithmetic number, because the mean of its divisors is an integer number (39091830585876).

Almost surely, 2^{78183661171751} is an apocalyptic number.

78183661171751 is a deficient number, since it is larger than the sum of its proper divisors (1).

78183661171751 is an equidigital number, since it uses as much as digits as its factorization.

78183661171751 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11854080, while the sum is 62.

The spelling of 78183661171751 in words is "seventy-eight trillion, one hundred eighty-three billion, six hundred sixty-one million, one hundred seventy-one thousand, seven hundred fifty-one".