80019398947 has 4 divisors (see below), whose sum is σ = 84230946280. Its totient is φ = 75807851616.

The previous prime is 80019398933. The next prime is 80019398957. The reversal of 80019398947 is 74989391008.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80019398947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 80019398891 and 80019398900.

It is not an unprimeable number, because it can be changed into a prime (80019398957) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2105773638 + ... + 2105773675.

It is an arithmetic number, because the mean of its divisors is an integer number (21057736570).

Almost surely, 2^80019398947 is an apocalyptic number.

80019398947 is a deficient number, since it is larger than the sum of its proper divisors (4211547333).

80019398947 is a wasteful number, since it uses less digits than its factorization.

80019398947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4211547332.

The product of its (nonzero) digits is 3919104, while the sum is 58.

The spelling of 80019398947 in words is "eighty billion, nineteen million, three hundred ninety-eight thousand, nine hundred forty-seven".