78598926025 has 27 divisors (see below), whose sum is σ = 99664003381. Its totient is φ = 61489701440.

The previous prime is 78598926023. The next prime is 78598926031. The reversal of 78598926025 is 52062989587.

The square root of 78598926025 is 280355.

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 1286011321 + 77312914704 = 35861^2 + 278052^2 .

It is not a de Polignac number, because 78598926025 - 2¹ = 78598926023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78598926023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 65882829 + ... + 65884021.

Almost surely, 2^78598926025 is an apocalyptic number.

78598926025 is the 280355-th square number.

78598926025 is the 140178-th centered octagonal number.

It is an amenable number.

78598926025 is a deficient number, since it is larger than the sum of its proper divisors (21065077356).

78598926025 is an frugal number, since it uses more digits than its factorization.

78598926025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2490 (or 1245 counting only the distinct ones).

The product of its (nonzero) digits is 21772800, while the sum is 61.

The spelling of 78598926025 in words is "seventy-eight billion, five hundred ninety-eight million, nine hundred twenty-six thousand, twenty-five".