78604923099646 has 4 divisors (see below), whose sum is σ = 117907384649472. Its totient is φ = 39302461549822.

The previous prime is 78604923099629. The next prime is 78604923099673. The reversal of 78604923099646 is 64699032940687.

It is a semiprime because it is the product of two primes.

It is a super-4 number, since 4×78604923099646⁴ (a number of 57 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19651230774910 + ... + 19651230774913.

It is an arithmetic number, because the mean of its divisors is an integer number (29476846162368).

Almost surely, 2^{78604923099646} is an apocalyptic number.

78604923099646 is a deficient number, since it is larger than the sum of its proper divisors (39302461549826).

78604923099646 is a wasteful number, since it uses less digits than its factorization.

78604923099646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39302461549825.

The product of its (nonzero) digits is 846526464, while the sum is 73.

The spelling of 78604923099646 in words is "seventy-eight trillion, six hundred four billion, nine hundred twenty-three million, ninety-nine thousand, six hundred forty-six".