80779525 has 12 divisors (see below), whose sum is σ = 100492452. Its totient is φ = 64413440.

The previous prime is 80779513. The next prime is 80779549. The reversal of 80779525 is 52597708.

It can be written as a sum of positive squares in 6 ways, for example, as 7214596 + 73564929 = 2686^2 + 8577^2 .

It is not a de Polignac number, because 80779525 - 2²³ = 72390917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2829 + ... + 13021.

It is an arithmetic number, because the mean of its divisors is an integer number (8374371).

Almost surely, 2^80779525 is an apocalyptic number.

It is an amenable number.

80779525 is a deficient number, since it is larger than the sum of its proper divisors (19712927).

80779525 is a wasteful number, since it uses less digits than its factorization.

80779525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10520 (or 10515 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 43.

The square root of 80779525 is about 8987.7430426109. The cubic root of 80779525 is about 432.2819465049.

The spelling of 80779525 in words is "eighty million, seven hundred seventy-nine thousand, five hundred twenty-five".