78825651 has 24 divisors (see below), whose sum is σ = 114473520. Its totient is φ = 48079872.

The previous prime is 78825641. The next prime is 78825667. The reversal of 78825651 is 15652887.

It is not a de Polignac number, because 78825651 - 2⁶ = 78825587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78825601) 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 23 ways as a sum of consecutive naturals, for example, 69255 + ... + 70383.

It is an arithmetic number, because the mean of its divisors is an integer number (4769730).

Almost surely, 2^78825651 is an apocalyptic number.

78825651 is a deficient number, since it is larger than the sum of its proper divisors (35647869).

78825651 is a wasteful number, since it uses less digits than its factorization.

78825651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1223 (or 1186 counting only the distinct ones).

The product of its digits is 134400, while the sum is 42.

The square root of 78825651 is about 8878.3811024308. The cubic root of 78825651 is about 428.7681546200.

The spelling of 78825651 in words is "seventy-eight million, eight hundred twenty-five thousand, six hundred fifty-one".