78656073378624 has 560 divisors, whose sum is σ = 267842272186368. Its totient is φ = 22450012835328.

The previous prime is 78656073378611. The next prime is 78656073378679. The reversal of 78656073378624 is 42687337065687.

It is a happy number.

78656073378624 is a `hidden beast` number, since 7 + 8 + 6 + 5 + 607 + 3 + 3 + 7 + 8 + 6 + 2 + 4 = 666.

It is a super-2 number, since 2×78656073378624² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 9726232309 + ... + 9726240395.

Almost surely, 2^{78656073378624} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78656073378624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133921136093184).

78656073378624 is an abundant number, since it is smaller than the sum of its proper divisors (189186198807744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78656073378624 is an frugal number, since it uses more digits than its factorization.

78656073378624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9236 (or 9202 counting only the distinct ones).

The product of its (nonzero) digits is 1706987520, while the sum is 72.

The spelling of 78656073378624 in words is "seventy-eight trillion, six hundred fifty-six billion, seventy-three million, three hundred seventy-eight thousand, six hundred twenty-four".