78645016 has 32 divisors (see below), whose sum is σ = 152830080. Its totient is φ = 37900800.

The previous prime is 78644989. The next prime is 78645019. The reversal of 78645016 is 61054687.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78645019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83106 + ... + 84046.

It is an arithmetic number, because the mean of its divisors is an integer number (4775940).

Almost surely, 2^78645016 is an apocalyptic number.

It is an amenable number.

78645016 is a deficient number, since it is larger than the sum of its proper divisors (74185064).

78645016 is a wasteful number, since it uses less digits than its factorization.

78645016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1315 (or 1311 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 78645016 is about 8868.2025236234. The cubic root of 78645016 is about 428.4403857980.

It can be divided in two parts, 7864 and 5016, that added together give a triangular number (12880 = T₁₆₀).

The spelling of 78645016 in words is "seventy-eight million, six hundred forty-five thousand, sixteen".