71833040138 has 4 divisors (see below), whose sum is σ = 107749560210. Its totient is φ = 35916520068.

The previous prime is 71833040117. The next prime is 71833040143. The reversal of 71833040138 is 83104033817.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 55195393969 + 16637646169 = 234937^2 + 128987^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17958260033 + ... + 17958260036.

Almost surely, 2^71833040138 is an apocalyptic number.

71833040138 is a deficient number, since it is larger than the sum of its proper divisors (35916520072).

71833040138 is a wasteful number, since it uses less digits than its factorization.

71833040138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35916520071.

The product of its (nonzero) digits is 48384, while the sum is 38.

The spelling of 71833040138 in words is "seventy-one billion, eight hundred thirty-three million, forty thousand, one hundred thirty-eight".