42791203578887 has 4 divisors (see below), whose sum is σ = 42791217385680. Its totient is φ = 42791189772096.

The previous prime is 42791203578833. The next prime is 42791203578941. The reversal of 42791203578887 is 78887530219724.

42791203578887 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (42791203578833) and next prime (42791203578941).

It is a cyclic number.

It is not a de Polignac number, because 42791203578887 - 2²⁸ = 42790935143431 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42791203578887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42791203578817) 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, 142958 + ... + 9252180.

It is an arithmetic number, because the mean of its divisors is an integer number (10697804346420).

Almost surely, 2^{42791203578887} is an apocalyptic number.

42791203578887 is a deficient number, since it is larger than the sum of its proper divisors (13806793).

42791203578887 is an equidigital number, since it uses as much as digits as its factorization.

42791203578887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13806792.

The product of its (nonzero) digits is 379330560, while the sum is 71.

The spelling of 42791203578887 in words is "forty-two trillion, seven hundred ninety-one billion, two hundred three million, five hundred seventy-eight thousand, eight hundred eighty-seven".