1945555055505 has 48 divisors (see below), whose sum is σ = 3444348660480. Its totient is φ = 1015463015424.

The previous prime is 1945555055503. The next prime is 1945555055569. The reversal of 1945555055505 is 5055505555491.

It is not a de Polignac number, because 1945555055505 - 2¹ = 1945555055503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1945555055503) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 29003334 + ... + 29070336.

It is an arithmetic number, because the mean of its divisors is an integer number (71757263760).

Almost surely, 2^{1945555055505} is an apocalyptic number.

1945555055505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1945555055505 is a deficient number, since it is larger than the sum of its proper divisors (1498793604975).

1945555055505 is a wasteful number, since it uses less digits than its factorization.

1945555055505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80790 (or 80787 counting only the distinct ones).

The product of its (nonzero) digits is 14062500, while the sum is 54.

The spelling of 1945555055505 in words is "one trillion, nine hundred forty-five billion, five hundred fifty-five million, fifty-five thousand, five hundred five".