80980784640 has 1280 divisors, whose sum is σ = 362033971200. Its totient is φ = 16729473024.

The previous prime is 80980784629. The next prime is 80980784657. The reversal of 80980784640 is 4648708908.

It is a tau number, because it is divible by the number of its divisors (1280).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 211437889 + ... + 211438271.

It is an arithmetic number, because the mean of its divisors is an integer number (282839040).

Almost surely, 2^80980784640 is an apocalyptic number.

80980784640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80980784640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181016985600).

80980784640 is an abundant number, since it is smaller than the sum of its proper divisors (281053186560).

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

80980784640 is a wasteful number, since it uses less digits than its factorization.

80980784640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464 (or 442 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 54.

The spelling of 80980784640 in words is "eighty billion, nine hundred eighty million, seven hundred eighty-four thousand, six hundred forty".