80861365 has 8 divisors (see below), whose sum is σ = 104497848. Its totient is φ = 59712960.

The previous prime is 80861351. The next prime is 80861377. The reversal of 80861365 is 56316808.

It can be written as a sum of positive squares in 4 ways, for example, as 16573041 + 64288324 = 4071^2 + 8018^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 80861365 - 2⁹ = 80860853 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 621946 + ... + 622075.

It is an arithmetic number, because the mean of its divisors is an integer number (13062231).

Almost surely, 2^80861365 is an apocalyptic number.

It is an amenable number.

80861365 is a deficient number, since it is larger than the sum of its proper divisors (23636483).

80861365 is a wasteful number, since it uses less digits than its factorization.

80861365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1244039.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 80861365 is about 8992.2947571796. The cubic root of 80861365 is about 432.4278828824.

The spelling of 80861365 in words is "eighty million, eight hundred sixty-one thousand, three hundred sixty-five".