42745787827 has 4 divisors (see below), whose sum is σ = 43739875960. Its totient is φ = 41751699696.

The previous prime is 42745787803. The next prime is 42745787857. The reversal of 42745787827 is 72878754724.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42745787827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42745787857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 497044002 + ... + 497044087.

It is an arithmetic number, because the mean of its divisors is an integer number (10934968990).

Almost surely, 2^42745787827 is an apocalyptic number.

42745787827 is a deficient number, since it is larger than the sum of its proper divisors (994088133).

42745787827 is an equidigital number, since it uses as much as digits as its factorization.

42745787827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994088132.

The product of its digits is 49172480, while the sum is 61.

The spelling of 42745787827 in words is "forty-two billion, seven hundred forty-five million, seven hundred eighty-seven thousand, eight hundred twenty-seven".