71081378 has 8 divisors (see below), whose sum is σ = 110298780. Its totient is φ = 34315120.

The previous prime is 71081377. The next prime is 71081383. The reversal of 71081378 is 87318017.

It can be written as a sum of positive squares in 2 ways, for example, as 69672409 + 1408969 = 8347^2 + 1187^2 .

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

It is not an unprimeable number, because it can be changed into a prime (71081377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 612713 + ... + 612828.

Almost surely, 2^71081378 is an apocalyptic number.

71081378 is a deficient number, since it is larger than the sum of its proper divisors (39217402).

71081378 is a wasteful number, since it uses less digits than its factorization.

71081378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225572.

The product of its (nonzero) digits is 9408, while the sum is 35.

The square root of 71081378 is about 8430.9772861751. The cubic root of 71081378 is about 414.2399171050.

The spelling of 71081378 in words is "seventy-one million, eighty-one thousand, three hundred seventy-eight".