1945503408365 has 24 divisors (see below), whose sum is σ = 2569892772384. Its totient is φ = 1412839656800.

The previous prime is 1945503408361. The next prime is 1945503408367. The reversal of 1945503408365 is 5638043055491.

It is not a de Polignac number, because 1945503408365 - 2² = 1945503408361 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 (1945503408361) 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 23 ways as a sum of consecutive naturals, for example, 1940891 + ... + 2767320.

It is an arithmetic number, because the mean of its divisors is an integer number (107078865516).

Almost surely, 2^{1945503408365} is an apocalyptic number.

It is an amenable number.

1945503408365 is a deficient number, since it is larger than the sum of its proper divisors (624389364019).

1945503408365 is a wasteful number, since it uses less digits than its factorization.

1945503408365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4708921 (or 4708910 counting only the distinct ones).

The product of its (nonzero) digits is 7776000, while the sum is 53.

The spelling of 1945503408365 in words is "one trillion, nine hundred forty-five billion, five hundred three million, four hundred eight thousand, three hundred sixty-five".