1805474473680 has 80 divisors (see below), whose sum is σ = 5840317445760. Its totient is φ = 460526820864.

The previous prime is 1805474473679. The next prime is 1805474473687. The reversal of 1805474473680 is 863744745081.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×1805474473680² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1805474473680.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1805474473687) 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, 163533835 + ... + 163544874.

It is an arithmetic number, because the mean of its divisors is an integer number (73003968072).

Almost surely, 2^{1805474473680} is an apocalyptic number.

1805474473680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1805474473680 is an abundant number, since it is smaller than the sum of its proper divisors (4034842972080).

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

1805474473680 is a wasteful number, since it uses less digits than its factorization.

1805474473680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327078748 (or 327078742 counting only the distinct ones).

The product of its (nonzero) digits is 18063360, while the sum is 57.

The spelling of 1805474473680 in words is "one trillion, eight hundred five billion, four hundred seventy-four million, four hundred seventy-three thousand, six hundred eighty".