42819515887 has 4 divisors (see below), whose sum is σ = 42932496520. Its totient is φ = 42706535256.

The previous prime is 42819515873. The next prime is 42819515911. The reversal of 42819515887 is 78851591824.

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

It is a cyclic number.

It is not a de Polignac number, because 42819515887 - 2⁷ = 42819515759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42819515857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56489748 + ... + 56490505.

It is an arithmetic number, because the mean of its divisors is an integer number (10733124130).

Almost surely, 2^42819515887 is an apocalyptic number.

42819515887 is a deficient number, since it is larger than the sum of its proper divisors (112980633).

42819515887 is a wasteful number, since it uses less digits than its factorization.

42819515887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112980632.

The product of its digits is 6451200, while the sum is 58.

The spelling of 42819515887 in words is "forty-two billion, eight hundred nineteen million, five hundred fifteen thousand, eight hundred eighty-seven".