779890625 has 56 divisors (see below), whose sum is σ = 1068736320. Its totient is φ = 567000000.

The previous prime is 779890619. The next prime is 779890633. The reversal of 779890625 is 526098977.

It is not a de Polignac number, because 779890625 - 2¹⁴ = 779874241 is a prime.

It is a congruent 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 55 ways as a sum of consecutive naturals, for example, 10984340 + ... + 10984410.

Almost surely, 2^779890625 is an apocalyptic number.

It is an amenable number.

779890625 is a deficient number, since it is larger than the sum of its proper divisors (288845695).

779890625 is an frugal number, since it uses more digits than its factorization.

779890625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157 (or 132 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 53.

The square root of 779890625 is about 27926.5218922801. The cubic root of 779890625 is about 920.4733799659.

The spelling of 779890625 in words is "seven hundred seventy-nine million, eight hundred ninety thousand, six hundred twenty-five".