1775308413649 has 9 divisors (see below), whose sum is σ = 1824637183131. Its totient is φ = 1727279138520.

The previous prime is 1775308413631. The next prime is 1775308413719. The reversal of 1775308413649 is 9463148035771.

It is a happy number.

The square root of 1775308413649 is 1332407.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1588570348225 + 186738065424 = 1260385^2 + 432132^2 .

It is not a de Polignac number, because 1775308413649 - 2¹³ = 1775308405457 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1775308413593 and 1775308413602.

It is not an unprimeable number, because it can be changed into a prime (1775308413629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 49281054 + ... + 49317064.

Almost surely, 2^{1775308413649} is an apocalyptic number.

1775308413649 is the 1332407-th square number.

1775308413649 is the 666204-th centered octagonal number.

It is an amenable number.

1775308413649 is a deficient number, since it is larger than the sum of its proper divisors (49328769482).

1775308413649 is an frugal number, since it uses more digits than its factorization.

1775308413649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72096 (or 36048 counting only the distinct ones).

The product of its (nonzero) digits is 15240960, while the sum is 58.

The spelling of 1775308413649 in words is "one trillion, seven hundred seventy-five billion, three hundred eight million, four hundred thirteen thousand, six hundred forty-nine".