80477777721457 has 16 divisors (see below), whose sum is σ = 80745096090240. Its totient is φ = 80210907393408.

The previous prime is 80477777721449. The next prime is 80477777721463. The reversal of 80477777721457 is 75412777777408.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 80477777721457 - 2³ = 80477777721449 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 80477777721457.

It is not an unprimeable number, because it can be changed into a prime (80477777721857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3829164813 + ... + 3829185829.

It is an arithmetic number, because the mean of its divisors is an integer number (5046568505640).

Almost surely, 2^{80477777721457} is an apocalyptic number.

It is an amenable number.

80477777721457 is a deficient number, since it is larger than the sum of its proper divisors (267318368783).

80477777721457 is a wasteful number, since it uses less digits than its factorization.

80477777721457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31080.

The product of its (nonzero) digits is 1054135040, while the sum is 73.

The spelling of 80477777721457 in words is "eighty trillion, four hundred seventy-seven billion, seven hundred seventy-seven million, seven hundred twenty-one thousand, four hundred fifty-seven".