80126513 has 4 divisors (see below), whose sum is σ = 81638388. Its totient is φ = 78614640.

The previous prime is 80126509. The next prime is 80126521. The reversal of 80126513 is 31562108.

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 65739664 + 14386849 = 8108^2 + 3793^2 .

It is a cyclic number.

It is not a de Polignac number, because 80126513 - 2² = 80126509 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80126533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 755858 + ... + 755963.

It is an arithmetic number, because the mean of its divisors is an integer number (20409597).

Almost surely, 2^80126513 is an apocalyptic number.

It is an amenable number.

80126513 is a deficient number, since it is larger than the sum of its proper divisors (1511875).

80126513 is a wasteful number, since it uses less digits than its factorization.

80126513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1511874.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 80126513 is about 8951.3414078561. The cubic root of 80126513 is about 431.1139550425.

The spelling of 80126513 in words is "eighty million, one hundred twenty-six thousand, five hundred thirteen".