1028455181680 has 20 divisors (see below), whose sum is σ = 2391158297592. Its totient is φ = 411382072640.

The previous prime is 1028455181647. The next prime is 1028455181701. The reversal of 1028455181680 is 861815548201.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6427844806 + ... + 6427844965.

Almost surely, 2^{1028455181680} is an apocalyptic number.

1028455181680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1028455181680 is an abundant number, since it is smaller than the sum of its proper divisors (1362703115912).

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

1028455181680 is a wasteful number, since it uses less digits than its factorization.

1028455181680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12855689784 (or 12855689778 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 49.

The spelling of 1028455181680 in words is "one trillion, twenty-eight billion, four hundred fifty-five million, one hundred eighty-one thousand, six hundred eighty".