78465643 has 8 divisors (see below), whose sum is σ = 79789568. Its totient is φ = 77146344.

The previous prime is 78465637. The next prime is 78465661. The reversal of 78465643 is 34656487.

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

It is a cyclic number.

It is not a de Polignac number, because 78465643 - 2⁹ = 78465131 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78465643.

It is not an unprimeable number, because it can be changed into a prime (78465623) 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, 54430 + ... + 55852.

It is an arithmetic number, because the mean of its divisors is an integer number (9973696).

Almost surely, 2^78465643 is an apocalyptic number.

78465643 is a deficient number, since it is larger than the sum of its proper divisors (1323925).

78465643 is a wasteful number, since it uses less digits than its factorization.

78465643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2313.

The product of its digits is 483840, while the sum is 43.

The square root of 78465643 is about 8858.0834834630. The cubic root of 78465643 is about 428.1144099037.

The spelling of 78465643 in words is "seventy-eight million, four hundred sixty-five thousand, six hundred forty-three".