78837448489 has 2 divisors, whose sum is σ = 78837448490. Its totient is φ = 78837448488.

The previous prime is 78837448483. The next prime is 78837448493. The reversal of 78837448489 is 98484473887.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72324958489 + 6512490000 = 268933^2 + 80700^2 .

It is a cyclic number.

It is not a de Polignac number, because 78837448489 - 2²⁹ = 78300577577 is a prime.

It is not a weakly prime, because it can be changed into another prime (78837448483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39418724244 + 39418724245.

It is an arithmetic number, because the mean of its divisors is an integer number (39418724245).

Almost surely, 2^78837448489 is an apocalyptic number.

It is an amenable number.

78837448489 is a deficient number, since it is larger than the sum of its proper divisors (1).

78837448489 is an equidigital number, since it uses as much as digits as its factorization.

78837448489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 346816512, while the sum is 70.

The spelling of 78837448489 in words is "seventy-eight billion, eight hundred thirty-seven million, four hundred forty-eight thousand, four hundred eighty-nine".