77078000449 has 2 divisors, whose sum is σ = 77078000450. Its totient is φ = 77078000448.

The previous prime is 77078000431. The next prime is 77078000491. The reversal of 77078000449 is 94400087077.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72317966400 + 4760034049 = 268920^2 + 68993^2 .

It is a cyclic number.

It is not a de Polignac number, because 77078000449 - 2²¹ = 77075903297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77078000399 and 77078000408.

It is not a weakly prime, because it can be changed into another prime (77078000849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38539000224 + 38539000225.

It is an arithmetic number, because the mean of its divisors is an integer number (38539000225).

Almost surely, 2^77078000449 is an apocalyptic number.

It is an amenable number.

77078000449 is a deficient number, since it is larger than the sum of its proper divisors (1).

77078000449 is an equidigital number, since it uses as much as digits as its factorization.

77078000449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 395136, while the sum is 46.

The spelling of 77078000449 in words is "seventy-seven billion, seventy-eight million, four hundred forty-nine", and thus it is an aban number.