80684734581 has 64 divisors (see below), whose sum is σ = 131072256000. Its totient is φ = 48648378240.

The previous prime is 80684734579. The next prime is 80684734631. The reversal of 80684734581 is 18543748608.

It is not a de Polignac number, because 80684734581 - 2¹ = 80684734579 is a prime.

It is a super-2 number, since 2×80684734581² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80684734561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 62594185 + ... + 62595473.

It is an arithmetic number, because the mean of its divisors is an integer number (2048004000).

Almost surely, 2^80684734581 is an apocalyptic number.

It is an amenable number.

80684734581 is a deficient number, since it is larger than the sum of its proper divisors (50387521419).

80684734581 is a wasteful number, since it uses less digits than its factorization.

80684734581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2231 (or 2225 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 54.

The spelling of 80684734581 in words is "eighty billion, six hundred eighty-four million, seven hundred thirty-four thousand, five hundred eighty-one".