878987746505 has 16 divisors (see below), whose sum is σ = 1150696065600. Its totient is φ = 639252039360.

The previous prime is 878987746501. The next prime is 878987746573. The reversal of 878987746505 is 505647789878.

It is not a de Polignac number, because 878987746505 - 2² = 878987746501 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (878987746501) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 3837086 + ... + 4059704.

It is an arithmetic number, because the mean of its divisors is an integer number (71918504100).

Almost surely, 2^878987746505 is an apocalyptic number.

It is an amenable number.

878987746505 is a deficient number, since it is larger than the sum of its proper divisors (271708319095).

878987746505 is a wasteful number, since it uses less digits than its factorization.

878987746505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294424.

The product of its (nonzero) digits is 948326400, while the sum is 74.

The spelling of 878987746505 in words is "eight hundred seventy-eight billion, nine hundred eighty-seven million, seven hundred forty-six thousand, five hundred five".