80802780005780 has 96 divisors (see below), whose sum is σ = 200616860989440. Its totient is φ = 26748098173440.

The previous prime is 80802780005743. The next prime is 80802780005789. The reversal of 80802780005780 is 8750008720808.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80802780005789) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 387954749 + ... + 388162971.

It is an arithmetic number, because the mean of its divisors is an integer number (2089758968640).

Almost surely, 2^{80802780005780} is an apocalyptic number.

It is an amenable number.

80802780005780 is an abundant number, since it is smaller than the sum of its proper divisors (119814080983660).

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

80802780005780 is a wasteful number, since it uses less digits than its factorization.

80802780005780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303849 (or 303847 counting only the distinct ones).

The product of its (nonzero) digits is 2007040, while the sum is 53.

The spelling of 80802780005780 in words is "eighty trillion, eight hundred two billion, seven hundred eighty million, five thousand, seven hundred eighty".