78821053841 has 8 divisors (see below), whose sum is σ = 79626232224. Its totient is φ = 78017144800.

The previous prime is 78821053793. The next prime is 78821053859. The reversal of 78821053841 is 14835012887.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78821053841 - 2²⁶ = 78753944977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78821052841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192260 + ... + 441141.

It is an arithmetic number, because the mean of its divisors is an integer number (9953279028).

Almost surely, 2^78821053841 is an apocalyptic number.

It is an amenable number.

78821053841 is a deficient number, since it is larger than the sum of its proper divisors (805178383).

78821053841 is a wasteful number, since it uses less digits than its factorization.

78821053841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634671.

The product of its (nonzero) digits is 430080, while the sum is 47.

The spelling of 78821053841 in words is "seventy-eight billion, eight hundred twenty-one million, fifty-three thousand, eight hundred forty-one".