80640135 has 24 divisors (see below), whose sum is σ = 140394384. Its totient is φ = 42817920.

The previous prime is 80640113. The next prime is 80640149. The reversal of 80640135 is 53104608.

80640135 is a `hidden beast` number, since 8 + 0 + 640 + 13 + 5 = 666.

It is not a de Polignac number, because 80640135 - 2⁵ = 80640103 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 80640099 and 80640108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6640 + ... + 14330.

It is an arithmetic number, because the mean of its divisors is an integer number (5849766).

Almost surely, 2^80640135 is an apocalyptic number.

80640135 is a deficient number, since it is larger than the sum of its proper divisors (59754249).

80640135 is a wasteful number, since it uses less digits than its factorization.

80640135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7935 (or 7932 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 80640135 is about 8979.9852449767. The cubic root of 80640135 is about 432.0331603918.

The spelling of 80640135 in words is "eighty million, six hundred forty thousand, one hundred thirty-five".