71139650 has 24 divisors (see below), whose sum is σ = 132557364. Its totient is φ = 28404800.

The previous prime is 71139631. The next prime is 71139661. The reversal of 71139650 is 5693117.

It can be written as a sum of positive squares in 6 ways, for example, as 16216729 + 54922921 = 4027^2 + 7411^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40184 + ... + 41916.

Almost surely, 2^71139650 is an apocalyptic number.

71139650 is a deficient number, since it is larger than the sum of its proper divisors (61417714).

71139650 is a wasteful number, since it uses less digits than its factorization.

71139650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2566 (or 2561 counting only the distinct ones).

The product of its (nonzero) digits is 5670, while the sum is 32.

The square root of 71139650 is about 8434.4324053252. The cubic root of 71139650 is about 414.3530831499.

The spelling of 71139650 in words is "seventy-one million, one hundred thirty-nine thousand, six hundred fifty".