80417679857 has 4 divisors (see below), whose sum is σ = 81780691440. Its totient is φ = 79054668276.

The previous prime is 80417679829. The next prime is 80417679877. The reversal of 80417679857 is 75897671408.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 80417679857 - 2¹⁰ = 80417678833 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 80417679857.

It is not an unprimeable number, because it can be changed into a prime (80417679827) 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, 681505703 + ... + 681505820.

It is an arithmetic number, because the mean of its divisors is an integer number (20445172860).

Almost surely, 2^80417679857 is an apocalyptic number.

It is an amenable number.

80417679857 is a deficient number, since it is larger than the sum of its proper divisors (1363011583).

80417679857 is a wasteful number, since it uses less digits than its factorization.

80417679857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1363011582.

The product of its (nonzero) digits is 23708160, while the sum is 62.

The spelling of 80417679857 in words is "eighty billion, four hundred seventeen million, six hundred seventy-nine thousand, eight hundred fifty-seven".