80646138 has 16 divisors (see below), whose sum is σ = 179213760. Its totient is φ = 26882028.

The previous prime is 80646103. The next prime is 80646161. The reversal of 80646138 is 83164608.

It is a happy number.

80646138 is a `hidden beast` number, since 8 + 0 + 646 + 1 + 3 + 8 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 746670 + ... + 746777.

It is an arithmetic number, because the mean of its divisors is an integer number (11200860).

Almost surely, 2^80646138 is an apocalyptic number.

80646138 is an abundant number, since it is smaller than the sum of its proper divisors (98567622).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80646138 is a wasteful number, since it uses less digits than its factorization.

80646138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1493458 (or 1493452 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 80646138 is about 8980.3194820674. The cubic root of 80646138 is about 432.0438805735.

The spelling of 80646138 in words is "eighty million, six hundred forty-six thousand, one hundred thirty-eight".