549693507078145 has 4 divisors (see below), whose sum is σ = 659632208493780. Its totient is φ = 439754805662512.

The previous prime is 549693507078137. The next prime is 549693507078169. The reversal of 549693507078145 is 541870705396945.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 345300535365696 + 204392971712449 = 18582264^2 + 14296607^2 .

It is a cyclic number.

It is not a de Polignac number, because 549693507078145 - 2³ = 549693507078137 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54969350707810 + ... + 54969350707819.

It is an arithmetic number, because the mean of its divisors is an integer number (164908052123445).

Almost surely, 2^{549693507078145} is an apocalyptic number.

It is an amenable number.

549693507078145 is a deficient number, since it is larger than the sum of its proper divisors (109938701415635).

549693507078145 is a wasteful number, since it uses less digits than its factorization.

549693507078145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109938701415634.

The product of its (nonzero) digits is 1143072000, while the sum is 73.

The spelling of 549693507078145 in words is "five hundred forty-nine trillion, six hundred ninety-three billion, five hundred seven million, seventy-eight thousand, one hundred forty-five".