80449481647 has 4 divisors (see below), whose sum is σ = 80512481736. Its totient is φ = 80386481560.

The previous prime is 80449481587. The next prime is 80449481669. The reversal of 80449481647 is 74618494408.

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-80449481647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80449481677) 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, 31498129 + ... + 31500682.

It is an arithmetic number, because the mean of its divisors is an integer number (20128120434).

Almost surely, 2^80449481647 is an apocalyptic number.

80449481647 is a deficient number, since it is larger than the sum of its proper divisors (63000089).

80449481647 is a wasteful number, since it uses less digits than its factorization.

80449481647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63000088.

The product of its (nonzero) digits is 6193152, while the sum is 55.

The spelling of 80449481647 in words is "eighty billion, four hundred forty-nine million, four hundred eighty-one thousand, six hundred forty-seven".