8721585994078 has 8 divisors (see below), whose sum is σ = 13103931511872. Its totient is φ = 4353608823456.

The previous prime is 8721585994061. The next prime is 8721585994109. The reversal of 8721585994078 is 8704995851278.

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

It is a self number, because there is not a number n which added to its sum of digits gives 8721585994078.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3592085275 + ... + 3592087702.

It is an arithmetic number, because the mean of its divisors is an integer number (1637991438984).

Almost surely, 2^{8721585994078} is an apocalyptic number.

8721585994078 is a deficient number, since it is larger than the sum of its proper divisors (4382345517794).

8721585994078 is a wasteful number, since it uses less digits than its factorization.

8721585994078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7184173586.

The product of its (nonzero) digits is 406425600, while the sum is 73.

The spelling of 8721585994078 in words is "eight trillion, seven hundred twenty-one billion, five hundred eighty-five million, nine hundred ninety-four thousand, seventy-eight".