820755540080 has 40 divisors (see below), whose sum is σ = 2180864722272. Its totient is φ = 281401899264.

The previous prime is 820755540061. The next prime is 820755540089. The reversal of 820755540080 is 80045557028.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820755540089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 732816887 + ... + 732818006.

Almost surely, 2^820755540080 is an apocalyptic number.

820755540080 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

820755540080 is an abundant number, since it is smaller than the sum of its proper divisors (1360109182192).

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

820755540080 is a wasteful number, since it uses less digits than its factorization.

820755540080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1465634913 (or 1465634907 counting only the distinct ones).

The product of its (nonzero) digits is 448000, while the sum is 44.

The spelling of 820755540080 in words is "eight hundred twenty billion, seven hundred fifty-five million, five hundred forty thousand, eighty".