7945545889281 has 64 divisors (see below), whose sum is σ = 14365028192256. Its totient is φ = 3772328544000.

The previous prime is 7945545889271. The next prime is 7945545889283. The reversal of 7945545889281 is 1829885455497.

It is not a de Polignac number, because 7945545889281 - 2⁷ = 7945545889153 is a prime.

It is a super-2 number, since 2×7945545889281² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7945545889283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12795061 + ... + 13401666.

It is an arithmetic number, because the mean of its divisors is an integer number (224453565504).

Almost surely, 2^{7945545889281} is an apocalyptic number.

It is an amenable number.

7945545889281 is a deficient number, since it is larger than the sum of its proper divisors (6419482302975).

7945545889281 is a wasteful number, since it uses less digits than its factorization.

7945545889281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26196862.

The product of its digits is 1161216000, while the sum is 75.

The spelling of 7945545889281 in words is "seven trillion, nine hundred forty-five billion, five hundred forty-five million, eight hundred eighty-nine thousand, two hundred eighty-one".