42780012313 has 4 divisors (see below), whose sum is σ = 43936228900. Its totient is φ = 41623795728.

The previous prime is 42780012271. The next prime is 42780012361. The reversal of 42780012313 is 31321008724.

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 31702870809 + 11077141504 = 178053^2 + 105248^2 .

It is a cyclic number.

It is not a de Polignac number, because 42780012313 - 2⁹ = 42780011801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42780012113) 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, 578108238 + ... + 578108311.

It is an arithmetic number, because the mean of its divisors is an integer number (10984057225).

Almost surely, 2^42780012313 is an apocalyptic number.

It is an amenable number.

42780012313 is a deficient number, since it is larger than the sum of its proper divisors (1156216587).

42780012313 is a wasteful number, since it uses less digits than its factorization.

42780012313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1156216586.

The product of its (nonzero) digits is 8064, while the sum is 31.

The spelling of 42780012313 in words is "forty-two billion, seven hundred eighty million, twelve thousand, three hundred thirteen".