80013761 has 4 divisors (see below), whose sum is σ = 81325524. Its totient is φ = 78702000.

The previous prime is 80013751. The next prime is 80013763. The reversal of 80013761 is 16731008.

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 45427600 + 34586161 = 6740^2 + 5881^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80013761 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 80013761.

It is not an unprimeable number, because it can be changed into a prime (80013763) 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, 655790 + ... + 655911.

It is an arithmetic number, because the mean of its divisors is an integer number (20331381).

Almost surely, 2^80013761 is an apocalyptic number.

It is an amenable number.

80013761 is a deficient number, since it is larger than the sum of its proper divisors (1311763).

80013761 is a wasteful number, since it uses less digits than its factorization.

80013761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1311762.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 80013761 is about 8945.0411402072. The cubic root of 80013761 is about 430.9116425697.

Adding to 80013761 its reverse (16731008), we get a palindrome (96744769).

The spelling of 80013761 in words is "eighty million, thirteen thousand, seven hundred sixty-one".