771216025 has 6 divisors (see below), whose sum is σ = 956307902. Its totient is φ = 616972800.

The previous prime is 771216001. The next prime is 771216031. The reversal of 771216025 is 520612177.

It can be written as a sum of positive squares in 3 ways, for example, as 20675209 + 750540816 = 4547^2 + 27396^2 .

It is not a de Polignac number, because 771216025 - 2⁹ = 771215513 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 15424296 + ... + 15424345.

Almost surely, 2^771216025 is an apocalyptic number.

It is an amenable number.

771216025 is a deficient number, since it is larger than the sum of its proper divisors (185091877).

771216025 is a wasteful number, since it uses less digits than its factorization.

771216025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30848651 (or 30848646 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 771216025 is about 27770.7764565559. The cubic root of 771216025 is about 917.0478880848.

The spelling of 771216025 in words is "seven hundred seventy-one million, two hundred sixteen thousand, twenty-five".