78521100841 has 8 divisors (see below), whose sum is σ = 80472268800. Its totient is φ = 76571648160.

The previous prime is 78521100839. The next prime is 78521100851. The reversal of 78521100841 is 14800112587.

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 78521100841 - 2¹ = 78521100839 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78521100841.

It is not an unprimeable number, because it can be changed into a prime (78521100851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335881 + ... + 519478.

It is an arithmetic number, because the mean of its divisors is an integer number (10059033600).

Almost surely, 2^78521100841 is an apocalyptic number.

It is an amenable number.

78521100841 is a deficient number, since it is larger than the sum of its proper divisors (1951167959).

78521100841 is a wasteful number, since it uses less digits than its factorization.

78521100841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857639.

The product of its (nonzero) digits is 17920, while the sum is 37.

The spelling of 78521100841 in words is "seventy-eight billion, five hundred twenty-one million, one hundred thousand, eight hundred forty-one".