71555136 has 56 divisors (see below), whose sum is σ = 190402464. Its totient is φ = 23715840.

The previous prime is 71555131. The next prime is 71555137. The reversal of 71555136 is 63155517.

It is a junction number, because it is equal to n+sod(n) for n = 71555097 and 71555106.

It is not an unprimeable number, because it can be changed into a prime (71555131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36091 + ... + 38021.

It is an arithmetic number, because the mean of its divisors is an integer number (3400044).

Almost surely, 2^71555136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71555136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95201232).

71555136 is an abundant number, since it is smaller than the sum of its proper divisors (118847328).

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

71555136 is a wasteful number, since it uses less digits than its factorization.

71555136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2139 (or 2129 counting only the distinct ones).

The product of its digits is 15750, while the sum is 33.

The square root of 71555136 is about 8459.0268943892. The cubic root of 71555136 is about 415.1581842422.

The spelling of 71555136 in words is "seventy-one million, five hundred fifty-five thousand, one hundred thirty-six".