78554361 has 16 divisors (see below), whose sum is σ = 110684160. Its totient is φ = 49455120.

The previous prime is 78554353. The next prime is 78554387. The reversal of 78554361 is 16345587.

It is not a de Polignac number, because 78554361 - 2³ = 78554353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78554261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1755 + ... + 12656.

It is an arithmetic number, because the mean of its divisors is an integer number (6917760).

Almost surely, 2^78554361 is an apocalyptic number.

It is an amenable number.

78554361 is a deficient number, since it is larger than the sum of its proper divisors (32129799).

78554361 is a wasteful number, since it uses less digits than its factorization.

78554361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14516.

The product of its digits is 100800, while the sum is 39.

The square root of 78554361 is about 8863.0898111212. The cubic root of 78554361 is about 428.2756998095.

The spelling of 78554361 in words is "seventy-eight million, five hundred fifty-four thousand, three hundred sixty-one".