78696851650560 has 3840 divisors, whose sum is σ = 362487334809600. Its totient is φ = 16027169587200.

The previous prime is 78696851650519. The next prime is 78696851650561. The reversal of 78696851650560 is 6505615869687.

It is a happy number.

78696851650560 is a `hidden beast` number, since 7 + 8 + 6 + 9 + 6 + 8 + 5 + 1 + 6 + 50 + 560 = 666.

It is a tau number, because it is divible by the number of its divisors (3840).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78696851650561) by changing a digit.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 62507427211 + ... + 62507428469.

It is an arithmetic number, because the mean of its divisors is an integer number (94397743440).

Almost surely, 2^{78696851650560} 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 78696851650560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181243667404800).

78696851650560 is an abundant number, since it is smaller than the sum of its proper divisors (283790483159040).

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

78696851650560 is a wasteful number, since it uses less digits than its factorization.

78696851650560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1370 (or 1341 counting only the distinct ones).

The product of its (nonzero) digits is 653184000, while the sum is 72.

The spelling of 78696851650560 in words is "seventy-eight trillion, six hundred ninety-six billion, eight hundred fifty-one million, six hundred fifty thousand, five hundred sixty".