1980044639856 has 60 divisors (see below), whose sum is σ = 5541656594760. Its totient is φ = 659981331840.

The previous prime is 1980044639803. The next prime is 1980044639861. The reversal of 1980044639856 is 6589364400891.

1980044639856 is a `hidden beast` number, since 1 + 9 + 80 + 0 + 4 + 463 + 98 + 5 + 6 = 666.

It is a super-3 number, since 3×1980044639856³ (a number of 38 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1980044639793 and 1980044639802.

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 11 ways as a sum of consecutive naturals, for example, 2578255 + ... + 3256913.

It is an arithmetic number, because the mean of its divisors is an integer number (92360943246).

Almost surely, 2^{1980044639856} is an apocalyptic number.

1980044639856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1980044639856 is an abundant number, since it is smaller than the sum of its proper divisors (3561611954904).

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

1980044639856 is a wasteful number, since it uses less digits than its factorization.

1980044639856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698934 (or 698925 counting only the distinct ones).

The product of its (nonzero) digits is 44789760, while the sum is 63.

The spelling of 1980044639856 in words is "one trillion, nine hundred eighty billion, forty-four million, six hundred thirty-nine thousand, eight hundred fifty-six".