78135161 has 8 divisors (see below), whose sum is σ = 84571200. Its totient is φ = 71759952.

The previous prime is 78135151. The next prime is 78135181. The reversal of 78135161 is 16153187.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78135161 - 2¹⁸ = 77873017 is a prime.

It is a super-2 number, since 2×78135161² = 12210206768991842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78135151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12515 + ... + 17688.

It is an arithmetic number, because the mean of its divisors is an integer number (10571400).

Almost surely, 2^78135161 is an apocalyptic number.

It is an amenable number.

78135161 is a deficient number, since it is larger than the sum of its proper divisors (6436039).

78135161 is a wasteful number, since it uses less digits than its factorization.

78135161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30415.

The product of its digits is 5040, while the sum is 32.

The square root of 78135161 is about 8839.4095391038. The cubic root of 78135161 is about 427.5125192690.

The spelling of 78135161 in words is "seventy-eight million, one hundred thirty-five thousand, one hundred sixty-one".