878144553856 has 32 divisors (see below), whose sum is σ = 1749996833400. Its totient is φ = 438929662464.

The previous prime is 878144553827. The next prime is 878144553883. The reversal of 878144553856 is 658355441878.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×878144553856² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (64).

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 in 3 ways as a sum of consecutive naturals, for example, 718011 + ... + 1507258.

Almost surely, 2^878144553856 is an apocalyptic number.

It is an amenable number.

878144553856 is a deficient number, since it is larger than the sum of its proper divisors (871852279544).

878144553856 is a wasteful number, since it uses less digits than its factorization.

878144553856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2228366 (or 2228354 counting only the distinct ones).

The product of its digits is 129024000, while the sum is 64.

The spelling of 878144553856 in words is "eight hundred seventy-eight billion, one hundred forty-four million, five hundred fifty-three thousand, eight hundred fifty-six".