71061717620 has 24 divisors (see below), whose sum is σ = 149234738688. Its totient is φ = 28423709600.

The previous prime is 71061717613. The next prime is 71061717641. The reversal of 71061717620 is 2671716017.

It is a happy number.

It is a super-2 number, since 2×71061717620² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 916985 + ... + 991455.

It is an arithmetic number, because the mean of its divisors is an integer number (6218114112).

Almost surely, 2^71061717620 is an apocalyptic number.

It is an amenable number.

71061717620 is an abundant number, since it is smaller than the sum of its proper divisors (78173021068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71061717620 is a wasteful number, since it uses less digits than its factorization.

71061717620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122191 (or 122189 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 38.

The spelling of 71061717620 in words is "seventy-one billion, sixty-one million, seven hundred seventeen thousand, six hundred twenty".