78821752404244 has 12 divisors (see below), whose sum is σ = 143935373955744. Its totient is φ = 37697359845464.

The previous prime is 78821752404209. The next prime is 78821752404251. The reversal of 78821752404244 is 44240425712887.

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, 428379089062 + ... + 428379089245.

It is an arithmetic number, because the mean of its divisors is an integer number (11994614496312).

Almost surely, 2^{78821752404244} is an apocalyptic number.

It is an amenable number.

78821752404244 is a deficient number, since it is larger than the sum of its proper divisors (65113621551500).

78821752404244 is a wasteful number, since it uses less digits than its factorization.

78821752404244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856758178334 (or 856758178332 counting only the distinct ones).

The product of its (nonzero) digits is 32112640, while the sum is 58.

The spelling of 78821752404244 in words is "seventy-eight trillion, eight hundred twenty-one billion, seven hundred fifty-two million, four hundred four thousand, two hundred forty-four".