80861011 has 16 divisors (see below), whose sum is σ = 101041920. Its totient is φ = 62866080.

The previous prime is 80860999. The next prime is 80861029. The reversal of 80861011 is 11016808.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 80861011 - 2⁷ = 80860883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80861611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44305 + ... + 46093.

It is an arithmetic number, because the mean of its divisors is an integer number (6315120).

Almost surely, 2^80861011 is an apocalyptic number.

80861011 is a deficient number, since it is larger than the sum of its proper divisors (20180909).

80861011 is a wasteful number, since it uses less digits than its factorization.

80861011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2394.

The product of its (nonzero) digits is 384, while the sum is 25.

The square root of 80861011 is about 8992.2750736396. The cubic root of 80861011 is about 432.4272518447.

Adding to 80861011 its reverse (11016808), we get a palindrome (91877819).

It can be divided in two parts, 8086 and 1011, that multiplied together give a triangular number (8174946 = T₄₀₄₃).

The spelling of 80861011 in words is "eighty million, eight hundred sixty-one thousand, eleven".