78616560 has 160 divisors (see below), whose sum is σ = 269482752. Its totient is φ = 18800640.

The previous prime is 78616541. The next prime is 78616561. The reversal of 78616560 is 6561687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78616561) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 255927 + ... + 256233.

Almost surely, 2^78616560 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 78616560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134741376).

78616560 is an abundant number, since it is smaller than the sum of its proper divisors (190866192).

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

78616560 is a wasteful number, since it uses less digits than its factorization.

78616560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431 (or 425 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 78616560 is about 8866.5979947215. The cubic root of 78616560 is about 428.3887055985.

The spelling of 78616560 in words is "seventy-eight million, six hundred sixteen thousand, five hundred sixty".