78690825479 has 32 divisors (see below), whose sum is σ = 97993276416. Its totient is φ = 61641423360.

The previous prime is 78690825463. The next prime is 78690825481. The reversal of 78690825479 is 97452809687.

It is a happy number.

It is not a de Polignac number, because 78690825479 - 2⁴ = 78690825463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78690825979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2196944 + ... + 2232474.

It is an arithmetic number, because the mean of its divisors is an integer number (3062289888).

Almost surely, 2^78690825479 is an apocalyptic number.

78690825479 is a deficient number, since it is larger than the sum of its proper divisors (19302450937).

78690825479 is a wasteful number, since it uses less digits than its factorization.

78690825479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36095.

The product of its (nonzero) digits is 60963840, while the sum is 65.

The spelling of 78690825479 in words is "seventy-eight billion, six hundred ninety million, eight hundred twenty-five thousand, four hundred seventy-nine".