78880415437 has 2 divisors, whose sum is σ = 78880415438. Its totient is φ = 78880415436.

The previous prime is 78880415413. The next prime is 78880415441. The reversal of 78880415437 is 73451408887.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49648306761 + 29232108676 = 222819^2 + 170974^2 .

It is a cyclic number.

It is not a de Polignac number, because 78880415437 - 2³¹ = 76732931789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78880416437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39440207718 + 39440207719.

It is an arithmetic number, because the mean of its divisors is an integer number (39440207719).

Almost surely, 2^78880415437 is an apocalyptic number.

It is an amenable number.

78880415437 is a deficient number, since it is larger than the sum of its proper divisors (1).

78880415437 is an equidigital number, since it uses as much as digits as its factorization.

78880415437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6021120, while the sum is 55.

The spelling of 78880415437 in words is "seventy-eight billion, eight hundred eighty million, four hundred fifteen thousand, four hundred thirty-seven".