80642155185 has 48 divisors (see below), whose sum is σ = 140593911120. Its totient is φ = 42759290880.

The previous prime is 80642155163. The next prime is 80642155207. The reversal of 80642155185 is 58155124608.

80642155185 is a `hidden beast` number, since 80 + 6 + 42 + 15 + 518 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (80642155163) and next prime (80642155207).

It can be written as a sum of positive squares in 8 ways, for example, as 6458372496 + 74183782689 = 80364^2 + 272367^2 .

It is not a de Polignac number, because 80642155185 - 2⁹ = 80642154673 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 80642155185.

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 47 ways as a sum of consecutive naturals, for example, 6250221 + ... + 6263109.

It is an arithmetic number, because the mean of its divisors is an integer number (2929039815).

Almost surely, 2^80642155185 is an apocalyptic number.

It is an amenable number.

80642155185 is a deficient number, since it is larger than the sum of its proper divisors (59951755935).

80642155185 is a wasteful number, since it uses less digits than its factorization.

80642155185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13698 (or 13695 counting only the distinct ones).

The product of its (nonzero) digits is 384000, while the sum is 45.

The spelling of 80642155185 in words is "eighty billion, six hundred forty-two million, one hundred fifty-five thousand, one hundred eighty-five".