80107781 has 32 divisors (see below), whose sum is σ = 96768000. Its totient is φ = 65596608.

The previous prime is 80107771. The next prime is 80107793. The reversal of 80107781 is 18770108.

It is a cyclic number.

It is not a de Polignac number, because 80107781 - 2⁶ = 80107717 is a prime.

It is a super-2 number, since 2×80107781² = 12834513153487922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80107771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 335060 + ... + 335298.

It is an arithmetic number, because the mean of its divisors is an integer number (3024000).

Almost surely, 2^80107781 is an apocalyptic number.

It is an amenable number.

80107781 is a deficient number, since it is larger than the sum of its proper divisors (16660219).

80107781 is a wasteful number, since it uses less digits than its factorization.

80107781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353.

The product of its (nonzero) digits is 3136, while the sum is 32.

The square root of 80107781 is about 8950.2950230705. The cubic root of 80107781 is about 431.0803571080.

Adding to 80107781 its reverse (18770108), we get a palindrome (98877889).

The spelling of 80107781 in words is "eighty million, one hundred seven thousand, seven hundred eighty-one".