42115257518 has 4 divisors (see below), whose sum is σ = 63172886280. Its totient is φ = 21057628758.

The previous prime is 42115257487. The next prime is 42115257533. The reversal of 42115257518 is 81575251124.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10528814378 + ... + 10528814381.

It is an arithmetic number, because the mean of its divisors is an integer number (15793221570).

Almost surely, 2^42115257518 is an apocalyptic number.

42115257518 is a deficient number, since it is larger than the sum of its proper divisors (21057628762).

42115257518 is a wasteful number, since it uses less digits than its factorization.

42115257518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21057628761.

The product of its digits is 112000, while the sum is 41.

The spelling of 42115257518 in words is "forty-two billion, one hundred fifteen million, two hundred fifty-seven thousand, five hundred eighteen".