78089508025 has 9 divisors (see below), whose sum is σ = 96832722541. Its totient is φ = 62470488640.

The previous prime is 78089507963. The next prime is 78089508031. The reversal of 78089508025 is 52080598087.

It is a happy number.

The square root of 78089508025 is 279445.

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 6973419049 + 71116088976 = 83507^2 + 266676^2 .

It is not a de Polignac number, because 78089508025 - 2¹³ = 78089499833 is a prime.

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, 1369281 + ... + 1425169.

Almost surely, 2^78089508025 is an apocalyptic number.

78089508025 is the 279445-th square number.

78089508025 is the 139723-rd centered octagonal number.

It is an amenable number.

78089508025 is a deficient number, since it is larger than the sum of its proper divisors (18743214516).

78089508025 is an frugal number, since it uses more digits than its factorization.

78089508025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111788 (or 55894 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 52.

The spelling of 78089508025 in words is "seventy-eight billion, eighty-nine million, five hundred eight thousand, twenty-five".