80544787840 has 256 divisors, whose sum is σ = 221685984000. Its totient is φ = 27675648000.

The previous prime is 80544787811. The next prime is 80544787903. The reversal of 80544787840 is 4878744508.

It is a super-2 number, since 2×80544787840² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 93765331 + ... + 93766189.

It is an arithmetic number, because the mean of its divisors is an integer number (865960875).

Almost surely, 2^80544787840 is an apocalyptic number.

80544787840 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 80544787840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110842992000).

80544787840 is an abundant number, since it is smaller than the sum of its proper divisors (141141196160).

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

80544787840 is a wasteful number, since it uses less digits than its factorization.

80544787840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1609 (or 1597 counting only the distinct ones).

The product of its (nonzero) digits is 8028160, while the sum is 55.

The spelling of 80544787840 in words is "eighty billion, five hundred forty-four million, seven hundred eighty-seven thousand, eight hundred forty".