80443779999 has 8 divisors (see below), whose sum is σ = 117009134592. Its totient is φ = 48753806040.

The previous prime is 80443779991. The next prime is 80443780007. The reversal of 80443779999 is 99997734408.

It is an interprime number because it is at equal distance from previous prime (80443779991) and next prime (80443780007).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 80443779999 - 2³ = 80443779991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80443779991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1218845119 + ... + 1218845184.

It is an arithmetic number, because the mean of its divisors is an integer number (14626141824).

Almost surely, 2^80443779999 is an apocalyptic number.

80443779999 is a deficient number, since it is larger than the sum of its proper divisors (36565354593).

80443779999 is a wasteful number, since it uses less digits than its factorization.

80443779999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2437690317.

The product of its (nonzero) digits is 123451776, while the sum is 69.

The spelling of 80443779999 in words is "eighty billion, four hundred forty-three million, seven hundred seventy-nine thousand, nine hundred ninety-nine".