80309391861 has 8 divisors (see below), whose sum is σ = 107108840800. Its totient is φ = 53524768752.

The previous prime is 80309391839. The next prime is 80309391889. The reversal of 80309391861 is 16819390308.

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

It is not a de Polignac number, because 80309391861 - 2⁵ = 80309391829 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80309391861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80309391821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3693811 + ... + 3715488.

It is an arithmetic number, because the mean of its divisors is an integer number (13388605100).

Almost surely, 2^80309391861 is an apocalyptic number.

It is an amenable number.

80309391861 is a deficient number, since it is larger than the sum of its proper divisors (26799448939).

80309391861 is a wasteful number, since it uses less digits than its factorization.

80309391861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7412915.

The product of its (nonzero) digits is 279936, while the sum is 48.

The spelling of 80309391861 in words is "eighty billion, three hundred nine million, three hundred ninety-one thousand, eight hundred sixty-one".