78840469658 has 8 divisors (see below), whose sum is σ = 118302933780. Its totient is φ = 39406158400.

The previous prime is 78840469637. The next prime is 78840469693. The reversal of 78840469658 is 85696404887.

It can be written as a sum of positive squares in 2 ways, for example, as 72149720449 + 6690749209 = 268607^2 + 81797^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 78840469594 and 78840469603.

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, 7031213 + ... + 7042416.

Almost surely, 2^78840469658 is an apocalyptic number.

78840469658 is a deficient number, since it is larger than the sum of its proper divisors (39462464122).

78840469658 is a wasteful number, since it uses less digits than its factorization.

78840469658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14076432.

The product of its (nonzero) digits is 92897280, while the sum is 65.

The spelling of 78840469658 in words is "seventy-eight billion, eight hundred forty million, four hundred sixty-nine thousand, six hundred fifty-eight".