78625859 has 8 divisors (see below), whose sum is σ = 84751632. Its totient is φ = 72511200.

The previous prime is 78625853. The next prime is 78625903. The reversal of 78625859 is 95852687.

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 78625859 - 2¹⁶ = 78560323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78625853) 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, 17384 + ... + 21434.

It is an arithmetic number, because the mean of its divisors is an integer number (10593954).

Almost surely, 2^78625859 is an apocalyptic number.

78625859 is a deficient number, since it is larger than the sum of its proper divisors (6125773).

78625859 is a wasteful number, since it uses less digits than its factorization.

78625859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5557.

The product of its digits is 1209600, while the sum is 50.

The square root of 78625859 is about 8867.1223629766. The cubic root of 78625859 is about 428.4055952951.

The spelling of 78625859 in words is "seventy-eight million, six hundred twenty-five thousand, eight hundred fifty-nine".