80738389440 has 280 divisors, whose sum is σ = 290668649040. Its totient is φ = 21270269952.

The previous prime is 80738389439. The next prime is 80738389441. The reversal of 80738389440 is 4498383708.

It is an interprime number because it is at equal distance from previous prime (80738389439) and next prime (80738389441).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80738389441) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2132596 + ... + 2170124.

It is an arithmetic number, because the mean of its divisors is an integer number (1038102318).

Almost surely, 2^80738389440 is an apocalyptic number.

80738389440 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 80738389440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145334324520).

80738389440 is an abundant number, since it is smaller than the sum of its proper divisors (209930259600).

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

80738389440 is a wasteful number, since it uses less digits than its factorization.

80738389440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37641 (or 37622 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 54.

The spelling of 80738389440 in words is "eighty billion, seven hundred thirty-eight million, three hundred eighty-nine thousand, four hundred forty".