1945487980801 has 16 divisors (see below), whose sum is σ = 1997085334608. Its totient is φ = 1894090060800.

The previous prime is 1945487980741. The next prime is 1945487980819. The reversal of 1945487980801 is 1080897845491.

It can be written as a sum of positive squares in 8 ways, for example, as 60567671025 + 1884920309776 = 246105^2 + 1372924^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1945487980801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1945487980201) 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 15 ways as a sum of consecutive naturals, for example, 97298461 + ... + 97318453.

It is an arithmetic number, because the mean of its divisors is an integer number (124817833413).

Almost surely, 2^{1945487980801} is an apocalyptic number.

It is an amenable number.

1945487980801 is a deficient number, since it is larger than the sum of its proper divisors (51597353807).

1945487980801 is a wasteful number, since it uses less digits than its factorization.

1945487980801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24852.

The product of its (nonzero) digits is 23224320, while the sum is 64.

The spelling of 1945487980801 in words is "one trillion, nine hundred forty-five billion, four hundred eighty-seven million, nine hundred eighty thousand, eight hundred one".