71450644 has 6 divisors (see below), whose sum is σ = 125038634. Its totient is φ = 35725320.

The previous prime is 71450611. The next prime is 71450683. The reversal of 71450644 is 44605417.

It can be written as a sum of positive squares in only one way, i.e., 70761744 + 688900 = 8412^2 + 830^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8931327 + ... + 8931334.

Almost surely, 2^71450644 is an apocalyptic number.

It is an amenable number.

71450644 is a deficient number, since it is larger than the sum of its proper divisors (53587990).

71450644 is a wasteful number, since it uses less digits than its factorization.

71450644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17862665 (or 17862663 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 71450644 is about 8452.8482773560. The cubic root of 71450644 is about 414.9560005609.

The spelling of 71450644 in words is "seventy-one million, four hundred fifty thousand, six hundred forty-four".