80642131911 has 12 divisors (see below), whose sum is σ = 127072450440. Its totient is φ = 48874019280.

The previous prime is 80642131907. The next prime is 80642131937. The reversal of 80642131911 is 11913124608.

80642131911 is a `hidden beast` number, since 8 + 0 + 642 + 1 + 3 + 1 + 9 + 1 + 1 = 666.

It is not a de Polignac number, because 80642131911 - 2² = 80642131907 is a prime.

It is a super-2 number, since 2×80642131911² (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 (80642131961) 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 11 ways as a sum of consecutive naturals, for example, 407283396 + ... + 407283593.

It is an arithmetic number, because the mean of its divisors is an integer number (10589370870).

Almost surely, 2^80642131911 is an apocalyptic number.

80642131911 is a deficient number, since it is larger than the sum of its proper divisors (46430318529).

80642131911 is a wasteful number, since it uses less digits than its factorization.

80642131911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814567006 (or 814567003 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The spelling of 80642131911 in words is "eighty billion, six hundred forty-two million, one hundred thirty-one thousand, nine hundred eleven".