78425202025 has 9 divisors (see below), whose sum is σ = 97248986821. Its totient is φ = 62739041440.

The previous prime is 78425202013. The next prime is 78425202059. The reversal of 78425202025 is 52020252487.

The square root of 78425202025 is 280045.

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 12250726489 + 66174475536 = 110683^2 + 257244^2 .

It is not a de Polignac number, because 78425202025 - 2¹¹ = 78425199977 is a prime.

It is a super-3 number, since 3×78425202025³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1372221 + ... + 1428229.

Almost surely, 2^78425202025 is an apocalyptic number.

78425202025 is the 280045-th square number.

78425202025 is the 140023-rd centered octagonal number.

It is an amenable number.

78425202025 is a deficient number, since it is larger than the sum of its proper divisors (18823784796).

78425202025 is an frugal number, since it uses more digits than its factorization.

78425202025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112028 (or 56014 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 37.

The spelling of 78425202025 in words is "seventy-eight billion, four hundred twenty-five million, two hundred two thousand, twenty-five".