78789683025 has 27 divisors (see below), whose sum is σ = 141128618449. Its totient is φ = 42018918720.

The previous prime is 78789683017. The next prime is 78789683069. The reversal of 78789683025 is 52038698787.

The square root of 78789683025 is 280695.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 2288761281 + 76500921744 = 47841^2 + 276588^2 .

It is not a de Polignac number, because 78789683025 - 2³ = 78789683017 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 26 ways as a sum of consecutive naturals, for example, 4201069 + ... + 4219781.

Almost surely, 2^78789683025 is an apocalyptic number.

78789683025 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

78789683025 is the 280695-th square number.

78789683025 is the 140348-th centered octagonal number.

It is an amenable number.

78789683025 is a deficient number, since it is larger than the sum of its proper divisors (62338935424).

78789683025 is an frugal number, since it uses more digits than its factorization.

78789683025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37442 (or 18721 counting only the distinct ones).

The product of its (nonzero) digits is 40642560, while the sum is 63.

The spelling of 78789683025 in words is "seventy-eight billion, seven hundred eighty-nine million, six hundred eighty-three thousand, twenty-five".