878142161302640 has 80 divisors (see below), whose sum is σ = 2294329954609728. Its totient is φ = 310139840237568.

The previous prime is 878142161302639. The next prime is 878142161302661. The reversal of 878142161302640 is 46203161241878.

It is a happy number.

878142161302640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×878142161302640² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18355790489 + ... + 18355838328.

Almost surely, 2^{878142161302640} is an apocalyptic number.

878142161302640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

878142161302640 is an abundant number, since it is smaller than the sum of its proper divisors (1416187793307088).

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

878142161302640 is a wasteful number, since it uses less digits than its factorization.

878142161302640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36711628866 (or 36711628860 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 53.

The spelling of 878142161302640 in words is "eight hundred seventy-eight trillion, one hundred forty-two billion, one hundred sixty-one million, three hundred two thousand, six hundred forty".