78381061 has 8 divisors (see below), whose sum is σ = 90007200. Its totient is φ = 67505040.

The previous prime is 78381047. The next prime is 78381077. The reversal of 78381061 is 16018387.

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 78381061 - 2⁷ = 78380933 is a prime.

It is a super-2 number, since 2×78381061² = 12287181446971442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78381001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187306 + ... + 187723.

It is an arithmetic number, because the mean of its divisors is an integer number (11250900).

Almost surely, 2^78381061 is an apocalyptic number.

It is an amenable number.

78381061 is a deficient number, since it is larger than the sum of its proper divisors (11626139).

78381061 is a wasteful number, since it uses less digits than its factorization.

78381061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375059.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 78381061 is about 8853.3079128651. The cubic root of 78381061 is about 427.9605260273.

The spelling of 78381061 in words is "seventy-eight million, three hundred eighty-one thousand, sixty-one".