78260161 has 8 divisors (see below), whose sum is σ = 90665984. Its totient is φ = 66160800.

The previous prime is 78260159. The next prime is 78260177. The reversal of 78260161 is 16106287.

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 78260161 - 2¹ = 78260159 is a prime.

It is a super-2 number, since 2×78260161² = 12249305599491842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78260131) 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, 76065 + ... + 77086.

It is an arithmetic number, because the mean of its divisors is an integer number (11333248).

Almost surely, 2^78260161 is an apocalyptic number.

It is an amenable number.

78260161 is a deficient number, since it is larger than the sum of its proper divisors (12405823).

78260161 is a wasteful number, since it uses less digits than its factorization.

78260161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153231.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 78260161 is about 8846.4773215105. The cubic root of 78260161 is about 427.7403748311.

The spelling of 78260161 in words is "seventy-eight million, two hundred sixty thousand, one hundred sixty-one".