42731760787 has 2 divisors, whose sum is σ = 42731760788. Its totient is φ = 42731760786.

The previous prime is 42731760767. The next prime is 42731760821. The reversal of 42731760787 is 78706713724.

It is a happy number.

42731760787 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42731760787 is a prime.

It is not a weakly prime, because it can be changed into another prime (42731760707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21365880393 + 21365880394.

It is an arithmetic number, because the mean of its divisors is an integer number (21365880394).

Almost surely, 2^42731760787 is an apocalyptic number.

42731760787 is a deficient number, since it is larger than the sum of its proper divisors (1).

42731760787 is an equidigital number, since it uses as much as digits as its factorization.

42731760787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2765952, while the sum is 52.

The spelling of 42731760787 in words is "forty-two billion, seven hundred thirty-one million, seven hundred sixty thousand, seven hundred eighty-seven".