42815807998 has 4 divisors (see below), whose sum is σ = 64223712000. Its totient is φ = 21407903998.

The previous prime is 42815807989. The next prime is 42815808029. The reversal of 42815807998 is 89970851824.

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, 10703951998 + ... + 10703952001.

It is an arithmetic number, because the mean of its divisors is an integer number (16055928000).

Almost surely, 2^42815807998 is an apocalyptic number.

42815807998 is a deficient number, since it is larger than the sum of its proper divisors (21407904002).

42815807998 is a wasteful number, since it uses less digits than its factorization.

42815807998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21407904001.

The product of its (nonzero) digits is 11612160, while the sum is 61.

The spelling of 42815807998 in words is "forty-two billion, eight hundred fifteen million, eight hundred seven thousand, nine hundred ninety-eight".