42878745620723 has 2 divisors, whose sum is σ = 42878745620724. Its totient is φ = 42878745620722.

The previous prime is 42878745620701. The next prime is 42878745620759. The reversal of 42878745620723 is 32702654787824.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42878745620723 - 2⁸ = 42878745620467 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42878745620723.

It is not a weakly prime, because it can be changed into another prime (42878745620783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21439372810361 + 21439372810362.

It is an arithmetic number, because the mean of its divisors is an integer number (21439372810362).

Almost surely, 2^{42878745620723} is an apocalyptic number.

42878745620723 is a deficient number, since it is larger than the sum of its proper divisors (1).

42878745620723 is an equidigital number, since it uses as much as digits as its factorization.

42878745620723 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252887040, while the sum is 65.

The spelling of 42878745620723 in words is "forty-two trillion, eight hundred seventy-eight billion, seven hundred forty-five million, six hundred twenty thousand, seven hundred twenty-three".