1945709054081 has 8 divisors (see below), whose sum is σ = 2126653295424. Its totient is φ = 1769232571920.

The previous prime is 1945709054077. The next prime is 1945709054089. The reversal of 1945709054081 is 1804509075491.

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 1945709054081 - 2² = 1945709054077 is a prime.

It is a super-2 number, since 2×1945709054081² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1945709054089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1116938885 + ... + 1116940626.

It is an arithmetic number, because the mean of its divisors is an integer number (265831661928).

Almost surely, 2^{1945709054081} is an apocalyptic number.

It is an amenable number.

1945709054081 is a deficient number, since it is larger than the sum of its proper divisors (180944241343).

1945709054081 is a wasteful number, since it uses less digits than its factorization.

1945709054081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2233879591.

The product of its (nonzero) digits is 1814400, while the sum is 53.

The spelling of 1945709054081 in words is "one trillion, nine hundred forty-five billion, seven hundred nine million, fifty-four thousand, eighty-one".