78825648889820 has 96 divisors (see below), whose sum is σ = 189494243527680. Its totient is φ = 26981276313600.

The previous prime is 78825648889753. The next prime is 78825648889861. The reversal of 78825648889820 is 2898884652887.

It is a super-3 number, since 3×78825648889820³ (a number of 43 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 953675495 + ... + 953758145.

It is an arithmetic number, because the mean of its divisors is an integer number (1973898370080).

Almost surely, 2^{78825648889820} is an apocalyptic number.

78825648889820 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

78825648889820 is an abundant number, since it is smaller than the sum of its proper divisors (110668594637860).

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

78825648889820 is a wasteful number, since it uses less digits than its factorization.

78825648889820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93843 (or 93841 counting only the distinct ones).

The product of its (nonzero) digits is 7927234560, while the sum is 83.

The spelling of 78825648889820 in words is "seventy-eight trillion, eight hundred twenty-five billion, six hundred forty-eight million, eight hundred eighty-nine thousand, eight hundred twenty".