71505516136 has 32 divisors (see below), whose sum is σ = 137593872000. Its totient is φ = 34825199040.

The previous prime is 71505516113. The next prime is 71505516151. The reversal of 71505516136 is 63161550517.

It is a happy number.

It is a super-2 number, since 2×71505516136² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 661036 + ... + 761563.

It is an arithmetic number, because the mean of its divisors is an integer number (4299808500).

Almost surely, 2^71505516136 is an apocalyptic number.

It is an amenable number.

71505516136 is a deficient number, since it is larger than the sum of its proper divisors (66088355864).

71505516136 is a wasteful number, since it uses less digits than its factorization.

71505516136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1422769 (or 1422765 counting only the distinct ones).

The product of its (nonzero) digits is 94500, while the sum is 40.

The spelling of 71505516136 in words is "seventy-one billion, five hundred five million, five hundred sixteen thousand, one hundred thirty-six".