80143877991 has 4 divisors (see below), whose sum is σ = 106858503992. Its totient is φ = 53429251992.

The previous prime is 80143877981. The next prime is 80143878007. The reversal of 80143877991 is 19977834108.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 80143877991 - 2¹¹ = 80143875943 is a prime.

It is a super-3 number, since 3×80143877991³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80143877911) 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 3 ways as a sum of consecutive naturals, for example, 13357312996 + ... + 13357313001.

It is an arithmetic number, because the mean of its divisors is an integer number (26714625998).

Almost surely, 2^80143877991 is an apocalyptic number.

80143877991 is a deficient number, since it is larger than the sum of its proper divisors (26714626001).

80143877991 is a wasteful number, since it uses less digits than its factorization.

80143877991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26714626000.

The product of its (nonzero) digits is 3048192, while the sum is 57.

The spelling of 80143877991 in words is "eighty billion, one hundred forty-three million, eight hundred seventy-seven thousand, nine hundred ninety-one".