80256474985 has 4 divisors (see below), whose sum is σ = 96307769988. Its totient is φ = 64205179984.

The previous prime is 80256474973. The next prime is 80256475009. The reversal of 80256474985 is 58947465208.

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

It can be written as a sum of positive squares in 2 ways, for example, as 48599525209 + 31656949776 = 220453^2 + 177924^2 .

It is a cyclic number.

It is not a de Polignac number, because 80256474985 - 2⁵ = 80256474953 is a prime.

It is a super-2 number, since 2×80256474985² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8025647494 + ... + 8025647503.

It is an arithmetic number, because the mean of its divisors is an integer number (24076942497).

Almost surely, 2^80256474985 is an apocalyptic number.

It is an amenable number.

80256474985 is a deficient number, since it is larger than the sum of its proper divisors (16051295003).

80256474985 is a wasteful number, since it uses less digits than its factorization.

80256474985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16051295002.

The product of its (nonzero) digits is 19353600, while the sum is 58.

The spelling of 80256474985 in words is "eighty billion, two hundred fifty-six million, four hundred seventy-four thousand, nine hundred eighty-five".