78856082007621 has 8 divisors (see below), whose sum is σ = 108533102118144. Its totient is φ = 50874891617760.

The previous prime is 78856082007467. The next prime is 78856082007701. The reversal of 78856082007621 is 12670028065887.

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

It is not a de Polignac number, because 78856082007621 - 2²⁷ = 78855947789893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78856082007721) 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, 423957430056 + ... + 423957430241.

It is an arithmetic number, because the mean of its divisors is an integer number (13566637764768).

Almost surely, 2^{78856082007621} is an apocalyptic number.

It is an amenable number.

78856082007621 is a deficient number, since it is larger than the sum of its proper divisors (29677020110523).

78856082007621 is a wasteful number, since it uses less digits than its factorization.

78856082007621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847914860331.

The product of its (nonzero) digits is 18063360, while the sum is 60.

The spelling of 78856082007621 in words is "seventy-eight trillion, eight hundred fifty-six billion, eighty-two million, seven thousand, six hundred twenty-one".