80540701840 has 20 divisors (see below), whose sum is σ = 187257131964. Its totient is φ = 32216280704.

The previous prime is 80540701823. The next prime is 80540701853. The reversal of 80540701840 is 4810704508.

It can be written as a sum of positive squares in 2 ways, for example, as 22098606336 + 58442095504 = 148656^2 + 241748^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 80540701840.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 503379307 + ... + 503379466.

Almost surely, 2^80540701840 is an apocalyptic number.

80540701840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

80540701840 is an abundant number, since it is smaller than the sum of its proper divisors (106716430124).

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

80540701840 is a wasteful number, since it uses less digits than its factorization.

80540701840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006758786 (or 1006758780 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 37.

The spelling of 80540701840 in words is "eighty billion, five hundred forty million, seven hundred one thousand, eight hundred forty".