71378611 has 8 divisors (see below), whose sum is σ = 75220880. Its totient is φ = 67544928.

The previous prime is 71378603. The next prime is 71378621. The reversal of 71378611 is 11687317.

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 71378611 - 2³ = 71378603 is a prime.

It is a super-2 number, since 2×71378611² = 10189812216578642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71378621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21985 + ... + 25021.

It is an arithmetic number, because the mean of its divisors is an integer number (9402610).

Almost surely, 2^71378611 is an apocalyptic number.

71378611 is a deficient number, since it is larger than the sum of its proper divisors (3842269).

71378611 is a wasteful number, since it uses less digits than its factorization.

71378611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4293.

The product of its digits is 7056, while the sum is 34.

The square root of 71378611 is about 8448.5863314521. The cubic root of 71378611 is about 414.8165076455.

The spelling of 71378611 in words is "seventy-one million, three hundred seventy-eight thousand, six hundred eleven".