104643644820 has 192 divisors, whose sum is σ = 352623317760. Its totient is φ = 22845542400.

The previous prime is 104643644767. The next prime is 104643644837. The reversal of 104643644820 is 28446346401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 203046 + ... + 500514.

It is an arithmetic number, because the mean of its divisors is an integer number (1836579780).

Almost surely, 2^104643644820 is an apocalyptic number.

104643644820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 104643644820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176311658880).

104643644820 is an abundant number, since it is smaller than the sum of its proper divisors (247979672940).

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

104643644820 is a wasteful number, since it uses less digits than its factorization.

104643644820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297546 (or 297544 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 42.

The spelling of 104643644820 in words is "one hundred four billion, six hundred forty-three million, six hundred forty-four thousand, eight hundred twenty".