80777845 has 12 divisors (see below), whose sum is σ = 99632484. Its totient is φ = 62870400.

The previous prime is 80777843. The next prime is 80777849. The reversal of 80777845 is 54877708.

It can be written as a sum of positive squares in 6 ways, for example, as 12236004 + 68541841 = 3498^2 + 8279^2 .

It is not a de Polignac number, because 80777845 - 2¹ = 80777843 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 80777795 and 80777804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80777843) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 945 + ... + 12745.

It is an arithmetic number, because the mean of its divisors is an integer number (8302707).

Almost surely, 2^80777845 is an apocalyptic number.

It is an amenable number.

80777845 is a deficient number, since it is larger than the sum of its proper divisors (18854639).

80777845 is a wasteful number, since it uses less digits than its factorization.

80777845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11880 (or 11843 counting only the distinct ones).

The product of its (nonzero) digits is 439040, while the sum is 46.

The square root of 80777845 is about 8987.6495815091. The cubic root of 80777845 is about 432.2789497112.

The spelling of 80777845 in words is "eighty million, seven hundred seventy-seven thousand, eight hundred forty-five".