71641936 has 20 divisors (see below), whose sum is σ = 139039092. Its totient is φ = 35760896.

The previous prime is 71641931. The next prime is 71641943. The reversal of 71641936 is 63914617.

It can be written as a sum of positive squares in 2 ways, for example, as 6031936 + 65610000 = 2456^2 + 8100^2 .

It is a junction number, because it is equal to n+sod(n) for n = 71641895 and 71641904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71641931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7020 + ... + 13876.

Almost surely, 2^71641936 is an apocalyptic number.

It is an amenable number.

71641936 is a deficient number, since it is larger than the sum of its proper divisors (67397156).

71641936 is a wasteful number, since it uses less digits than its factorization.

71641936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7518 (or 7512 counting only the distinct ones).

The product of its digits is 27216, while the sum is 37.

The square root of 71641936 is about 8464.1559531946. The cubic root of 71641936 is about 415.3259857035.

The spelling of 71641936 in words is "seventy-one million, six hundred forty-one thousand, nine hundred thirty-six".