87889722798878 has 48 divisors (see below), whose sum is σ = 180169541670384. Its totient is φ = 31608691511040.

The previous prime is 87889722798863. The next prime is 87889722798929.

87889722798878 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (98).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3135768875 + ... + 3135796902.

It is an arithmetic number, because the mean of its divisors is an integer number (3753532118133).

Almost surely, 2^{87889722798878} is an apocalyptic number.

87889722798878 is an abundant number, since it is smaller than the sum of its proper divisors (92279818871506).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87889722798878 is a wasteful number, since it uses less digits than its factorization.

87889722798878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6271565817 (or 6271565810 counting only the distinct ones).

The product of its digits is 203928109056, while the sum is 98.

The spelling of 87889722798878 in words is "eighty-seven trillion, eight hundred eighty-nine billion, seven hundred twenty-two million, seven hundred ninety-eight thousand, eight hundred seventy-eight".