83887078838 has 4 divisors (see below), whose sum is σ = 125830618260. Its totient is φ = 41943539418.

The previous prime is 83887078829. The next prime is 83887078843.

83887078838 is nontrivially palindromic in base 10.

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, 20971769708 + ... + 20971769711.

It is an arithmetic number, because the mean of its divisors is an integer number (31457654565).

Almost surely, 2^83887078838 is an apocalyptic number.

83887078838 is a deficient number, since it is larger than the sum of its proper divisors (41943539422).

83887078838 is a wasteful number, since it uses less digits than its factorization.

83887078838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41943539421.

The product of its (nonzero) digits is 115605504, while the sum is 68.

The spelling of 83887078838 in words is "eighty-three billion, eight hundred eighty-seven million, seventy-eight thousand, eight hundred thirty-eight".