1538994047617 has 8 divisors (see below), whose sum is σ = 1729438127424. Its totient is φ = 1358844242448.

The previous prime is 1538994047581. The next prime is 1538994047629. The reversal of 1538994047617 is 7167404998351.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1538994047617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1538994047117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2573568343 + ... + 2573568940.

It is an arithmetic number, because the mean of its divisors is an integer number (216179765928).

Almost surely, 2^{1538994047617} is an apocalyptic number.

It is an amenable number.

1538994047617 is a deficient number, since it is larger than the sum of its proper divisors (190444079807).

1538994047617 is a wasteful number, since it uses less digits than its factorization.

1538994047617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5147137319.

The product of its (nonzero) digits is 45722880, while the sum is 64.

The spelling of 1538994047617 in words is "one trillion, five hundred thirty-eight billion, nine hundred ninety-four million, forty-seven thousand, six hundred seventeen".