80123777285 has 4 divisors (see below), whose sum is σ = 96148532748. Its totient is φ = 64099021824.

The previous prime is 80123777281. The next prime is 80123777303. The reversal of 80123777285 is 58277732108.

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 33849744289 + 46274032996 = 183983^2 + 215114^2 .

It is a cyclic number.

It is not a de Polignac number, because 80123777285 - 2² = 80123777281 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 (80123777281) 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, 8012377724 + ... + 8012377733.

It is an arithmetic number, because the mean of its divisors is an integer number (24037133187).

Almost surely, 2^80123777285 is an apocalyptic number.

It is an amenable number.

80123777285 is a deficient number, since it is larger than the sum of its proper divisors (16024755463).

80123777285 is a wasteful number, since it uses less digits than its factorization.

80123777285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16024755462.

The product of its (nonzero) digits is 1317120, while the sum is 50.

The spelling of 80123777285 in words is "eighty billion, one hundred twenty-three million, seven hundred seventy-seven thousand, two hundred eighty-five".