78161361 has 8 divisors (see below), whose sum is σ = 104648544. Its totient is φ = 51890880.

The previous prime is 78161357. The next prime is 78161387. The reversal of 78161361 is 16316187.

78161361 is nontrivially palindromic in base 15.

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

It is not a de Polignac number, because 78161361 - 2² = 78161357 is a prime.

It is a super-2 number, since 2×78161361² = 12218396706744642, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78161311) 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, 53331 + ... + 54776.

It is an arithmetic number, because the mean of its divisors is an integer number (13081068).

Almost surely, 2^78161361 is an apocalyptic number.

It is an amenable number.

78161361 is a deficient number, since it is larger than the sum of its proper divisors (26487183).

78161361 is a wasteful number, since it uses less digits than its factorization.

78161361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108351.

The product of its digits is 6048, while the sum is 33.

The square root of 78161361 is about 8840.8914143315. The cubic root of 78161361 is about 427.5602979138.

The spelling of 78161361 in words is "seventy-eight million, one hundred sixty-one thousand, three hundred sixty-one".