78248250737 has 2 divisors, whose sum is σ = 78248250738. Its totient is φ = 78248250736.

The previous prime is 78248250727. The next prime is 78248250739. The reversal of 78248250737 is 73705284287.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42225729121 + 36022521616 = 205489^2 + 189796^2 .

It is a cyclic number.

It is not a de Polignac number, because 78248250737 - 2⁶ = 78248250673 is a prime.

It is a super-2 number, since 2×78248250737² (a number of 23 digits) contains 22 as substring.

Together with 78248250739, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78248250739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39124125368 + 39124125369.

It is an arithmetic number, because the mean of its divisors is an integer number (39124125369).

Almost surely, 2^78248250737 is an apocalyptic number.

It is an amenable number.

78248250737 is a deficient number, since it is larger than the sum of its proper divisors (1).

78248250737 is an equidigital number, since it uses as much as digits as its factorization.

78248250737 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5268480, while the sum is 53.

The spelling of 78248250737 in words is "seventy-eight billion, two hundred forty-eight million, two hundred fifty thousand, seven hundred thirty-seven".