42878537145791 has 2 divisors, whose sum is σ = 42878537145792. Its totient is φ = 42878537145790.

The previous prime is 42878537145749. The next prime is 42878537145797. The reversal of 42878537145791 is 19754173587824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42878537145791 - 2¹⁸ = 42878536883647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42878537145797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21439268572895 + 21439268572896.

It is an arithmetic number, because the mean of its divisors is an integer number (21439268572896).

Almost surely, 2^{42878537145791} is an apocalyptic number.

42878537145791 is a deficient number, since it is larger than the sum of its proper divisors (1).

42878537145791 is an equidigital number, since it uses as much as digits as its factorization.

42878537145791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 474163200, while the sum is 71.

The spelling of 42878537145791 in words is "forty-two trillion, eight hundred seventy-eight billion, five hundred thirty-seven million, one hundred forty-five thousand, seven hundred ninety-one".