8077681840 has 40 divisors (see below), whose sum is σ = 18844762608. Its totient is φ = 3220035840.

The previous prime is 8077681819. The next prime is 8077681853. The reversal of 8077681840 is 481867708.

It is a tau number, because it is divible by the number of its divisors (40).

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 7 ways as a sum of consecutive naturals, for example, 148866 + ... + 195745.

Almost surely, 2^8077681840 is an apocalyptic number.

8077681840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8077681840 is an abundant number, since it is smaller than the sum of its proper divisors (10767080768).

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

8077681840 is a wasteful number, since it uses less digits than its factorization.

8077681840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344917 (or 344911 counting only the distinct ones).

The product of its (nonzero) digits is 602112, while the sum is 49.

The square root of 8077681840 is about 89875.9246962166. The cubic root of 8077681840 is about 2006.4526459579.

The spelling of 8077681840 in words is "eight billion, seventy-seven million, six hundred eighty-one thousand, eight hundred forty".