78501012 has 12 divisors (see below), whose sum is σ = 183169056. Its totient is φ = 26167000.

The previous prime is 78501011. The next prime is 78501077. The reversal of 78501012 is 21010587.

It is a tau number, because it is divible by the number of its divisors (12).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78501011) 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 3 ways as a sum of consecutive naturals, for example, 3270864 + ... + 3270887.

It is an arithmetic number, because the mean of its divisors is an integer number (15264088).

Almost surely, 2^78501012 is an apocalyptic number.

It is an amenable number.

78501012 is an abundant number, since it is smaller than the sum of its proper divisors (104668044).

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

78501012 is a wasteful number, since it uses less digits than its factorization.

78501012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6541758 (or 6541756 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 24.

The square root of 78501012 is about 8860.0796836146. The cubic root of 78501012 is about 428.1787255432.

Adding to 78501012 its reverse (21010587), we get a palindrome (99511599).

The spelling of 78501012 in words is "seventy-eight million, five hundred one thousand, twelve".