78864601 has 8 divisors (see below), whose sum is σ = 82703880. Its totient is φ = 75100032.

The previous prime is 78864563. The next prime is 78864647. The reversal of 78864601 is 10646887.

It can be written as a sum of positive squares in 4 ways, for example, as 42250000 + 36614601 = 6500^2 + 6051^2 .

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 78864601 - 2⁹ = 78864089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78864001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16510 + ... + 20743.

It is an arithmetic number, because the mean of its divisors is an integer number (10337985).

Almost surely, 2^78864601 is an apocalyptic number.

It is an amenable number.

78864601 is a deficient number, since it is larger than the sum of its proper divisors (3839279).

78864601 is a wasteful number, since it uses less digits than its factorization.

78864601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37355.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 78864601 is about 8880.5743620556. The cubic root of 78864601 is about 428.8387651782.

The spelling of 78864601 in words is "seventy-eight million, eight hundred sixty-four thousand, six hundred one".