1205802111648 has 48 divisors (see below), whose sum is σ = 3186192373056. Its totient is φ = 399272217600.

The previous prime is 1205802111617. The next prime is 1205802111671. The reversal of 1205802111648 is 8461112085021.

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

It is an unprimeable number.

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, 41576361 + ... + 41605352.

It is an arithmetic number, because the mean of its divisors is an integer number (66379007772).

Almost surely, 2^{1205802111648} is an apocalyptic number.

It is an amenable number.

1205802111648 is an abundant number, since it is smaller than the sum of its proper divisors (1980390261408).

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

1205802111648 is a wasteful number, since it uses less digits than its factorization.

1205802111648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83181877 (or 83181869 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 39.

Adding to 1205802111648 its reverse (8461112085021), we get a palindrome (9666914196669).

The spelling of 1205802111648 in words is "one trillion, two hundred five billion, eight hundred two million, one hundred eleven thousand, six hundred forty-eight".