78450308737 has 2 divisors, whose sum is σ = 78450308738. Its totient is φ = 78450308736.

The previous prime is 78450308639. The next prime is 78450308753. The reversal of 78450308737 is 73780305487.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71259099136 + 7191209601 = 266944^2 + 84801^2 .

It is a cyclic number.

It is not a de Polignac number, because 78450308737 - 2²³ = 78441920129 is a prime.

It is not a weakly prime, because it can be changed into another prime (78450308137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39225154368 + 39225154369.

It is an arithmetic number, because the mean of its divisors is an integer number (39225154369).

Almost surely, 2^78450308737 is an apocalyptic number.

It is an amenable number.

78450308737 is a deficient number, since it is larger than the sum of its proper divisors (1).

78450308737 is an equidigital number, since it uses as much as digits as its factorization.

78450308737 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3951360, while the sum is 52.

The spelling of 78450308737 in words is "seventy-eight billion, four hundred fifty million, three hundred eight thousand, seven hundred thirty-seven".