78880415441 has 2 divisors, whose sum is σ = 78880415442. Its totient is φ = 78880415440.

The previous prime is 78880415437. The next prime is 78880415473. The reversal of 78880415441 is 14451408887.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74212656400 + 4667759041 = 272420^2 + 68321^2 .

It is a cyclic number.

It is not a de Polignac number, because 78880415441 - 2² = 78880415437 is a prime.

It is a super-3 number, since 3×78880415441³ (a number of 34 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78880415441.

It is not a weakly prime, because it can be changed into another prime (78880475441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39440207720 + 39440207721.

It is an arithmetic number, because the mean of its divisors is an integer number (39440207721).

Almost surely, 2^78880415441 is an apocalyptic number.

It is an amenable number.

78880415441 is a deficient number, since it is larger than the sum of its proper divisors (1).

78880415441 is an equidigital number, since it uses as much as digits as its factorization.

78880415441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1146880, while the sum is 50.

The spelling of 78880415441 in words is "seventy-eight billion, eight hundred eighty million, four hundred fifteen thousand, four hundred forty-one".