8077780525 has 12 divisors (see below), whose sum is σ = 10115623764. Its totient is φ = 6398240000.

The previous prime is 8077780519. The next prime is 8077780559. The reversal of 8077780525 is 5250877708.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 392277636 + 7685502889 = 19806^2 + 87667^2 .

It is not a de Polignac number, because 8077780525 - 2⁷ = 8077780397 is a prime.

It is a Duffinian number.

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 11 ways as a sum of consecutive naturals, for example, 1597036 + ... + 1602085.

It is an arithmetic number, because the mean of its divisors is an integer number (842968647).

Almost surely, 2^8077780525 is an apocalyptic number.

It is an amenable number.

8077780525 is a deficient number, since it is larger than the sum of its proper divisors (2037843239).

8077780525 is a wasteful number, since it uses less digits than its factorization.

8077780525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3199232 (or 3199227 counting only the distinct ones).

The product of its (nonzero) digits is 1097600, while the sum is 49.

The square root of 8077780525 is about 89876.4737014086. The cubic root of 8077780525 is about 2006.4608168653.

The spelling of 8077780525 in words is "eight billion, seventy-seven million, seven hundred eighty thousand, five hundred twenty-five".