1945606357549 has 8 divisors (see below), whose sum is σ = 2149621346880. Its totient is φ = 1751543318976.

The previous prime is 1945606357441. The next prime is 1945606357579. The reversal of 1945606357549 is 9457536065491.

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

It is a cyclic number.

It is not a de Polignac number, because 1945606357549 - 2¹¹ = 1945606355501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1945606357579) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2487987279 + ... + 2487988060.

It is an arithmetic number, because the mean of its divisors is an integer number (268702668360).

Almost surely, 2^{1945606357549} is an apocalyptic number.

It is an amenable number.

1945606357549 is a deficient number, since it is larger than the sum of its proper divisors (204014989331).

1945606357549 is a wasteful number, since it uses less digits than its factorization.

1945606357549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4975975379.

The product of its (nonzero) digits is 122472000, while the sum is 64.

The spelling of 1945606357549 in words is "one trillion, nine hundred forty-five billion, six hundred six million, three hundred fifty-seven thousand, five hundred forty-nine".