80618109 has 16 divisors (see below), whose sum is σ = 126283584. Its totient is φ = 45100800.

The previous prime is 80618107. The next prime is 80618123. The reversal of 80618109 is 90181608.

It is not a de Polignac number, because 80618109 - 2¹ = 80618107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 80618109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80618101) 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, 93532 + ... + 94389.

It is an arithmetic number, because the mean of its divisors is an integer number (7892724).

Almost surely, 2^80618109 is an apocalyptic number.

It is an amenable number.

80618109 is a deficient number, since it is larger than the sum of its proper divisors (45665475).

80618109 is a wasteful number, since it uses less digits than its factorization.

80618109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187948.

The product of its (nonzero) digits is 3456, while the sum is 33.

The square root of 80618109 is about 8978.7587672239. The cubic root of 80618109 is about 431.9938217138.

It can be divided in two parts, 806 and 18109, that added together give a triangular number (18915 = T₁₉₄).

The spelling of 80618109 in words is "eighty million, six hundred eighteen thousand, one hundred nine".