1945681660896 has 48 divisors (see below), whose sum is σ = 5112020062800. Its totient is φ = 647975702528.

The previous prime is 1945681660891. The next prime is 1945681660907. The reversal of 1945681660896 is 6980661865491.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 1945681660896.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1945681660891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9031281 + ... + 9244208.

It is an arithmetic number, because the mean of its divisors is an integer number (106500417975).

Almost surely, 2^{1945681660896} is an apocalyptic number.

1945681660896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1945681660896 is an abundant number, since it is smaller than the sum of its proper divisors (3166338401904).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1945681660896 is a wasteful number, since it uses less digits than its factorization.

1945681660896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18276611 (or 18276603 counting only the distinct ones).

The product of its (nonzero) digits is 134369280, while the sum is 69.

The spelling of 1945681660896 in words is "one trillion, nine hundred forty-five billion, six hundred eighty-one million, six hundred sixty thousand, eight hundred ninety-six".