779945091025 has 9 divisors (see below), whose sum is σ = 967137388401. Its totient is φ = 623952540240.

The previous prime is 779945091001. The next prime is 779945091047. The reversal of 779945091025 is 520190549977.

The square root of 779945091025 is 883145.

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 86545809 + 779858545216 = 9303^2 + 883096^2 .

It is not a de Polignac number, because 779945091025 - 2⁹ = 779945090513 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, 4327411 + ... + 4504039.

Almost surely, 2^779945091025 is an apocalyptic number.

779945091025 is the 883145-th square number.

779945091025 is the 441573-rd centered octagonal number.

It is an amenable number.

779945091025 is a deficient number, since it is larger than the sum of its proper divisors (187192297376).

779945091025 is an frugal number, since it uses more digits than its factorization.

779945091025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353268 (or 176634 counting only the distinct ones).

The product of its (nonzero) digits is 7144200, while the sum is 58.

The spelling of 779945091025 in words is "seven hundred seventy-nine billion, nine hundred forty-five million, ninety-one thousand, twenty-five".