71620011 has 16 divisors (see below), whose sum is σ = 106290720. Its totient is φ = 47662560.

The previous prime is 71620001. The next prime is 71620027. The reversal of 71620011 is 11002617.

It is not a de Polignac number, because 71620011 - 2¹¹ = 71617963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71620001) 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 15 ways as a sum of consecutive naturals, for example, 15841 + ... + 19853.

It is an arithmetic number, because the mean of its divisors is an integer number (6643170).

Almost surely, 2^71620011 is an apocalyptic number.

71620011 is a deficient number, since it is larger than the sum of its proper divisors (34670709).

71620011 is a wasteful number, since it uses less digits than its factorization.

71620011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4683 (or 4677 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 18.

The square root of 71620011 is about 8462.8606865527. The cubic root of 71620011 is about 415.2836131685.

Adding to 71620011 its reverse (11002617), we get a palindrome (82622628).

The spelling of 71620011 in words is "seventy-one million, six hundred twenty thousand, eleven".