80457656665647 has 24 divisors (see below), whose sum is σ = 111183943100160. Its totient is φ = 51751342724400.

The previous prime is 80457656665643. The next prime is 80457656665679. The reversal of 80457656665647 is 74656665675408.

It is not a de Polignac number, because 80457656665647 - 2² = 80457656665643 is a prime.

It is a super-2 number, since 2×80457656665647² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80457656665643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41202247 + ... + 43110792.

It is an arithmetic number, because the mean of its divisors is an integer number (4632664295840).

Almost surely, 2^{80457656665647} is an apocalyptic number.

80457656665647 is a deficient number, since it is larger than the sum of its proper divisors (30726286434513).

80457656665647 is a wasteful number, since it uses less digits than its factorization.

80457656665647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84313435 (or 84313404 counting only the distinct ones).

The product of its (nonzero) digits is 6096384000, while the sum is 75.

The spelling of 80457656665647 in words is "eighty trillion, four hundred fifty-seven billion, six hundred fifty-six million, six hundred sixty-five thousand, six hundred forty-seven".