71131784338 has 8 divisors (see below), whose sum is σ = 106708556988. Its totient is φ = 35562265344.

The previous prime is 71131784323. The next prime is 71131784357. The reversal of 71131784338 is 83348713117.

It can be written as a sum of positive squares in 2 ways, for example, as 64824724449 + 6307059889 = 254607^2 + 79417^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1788831 + ... + 1828162.

Almost surely, 2^71131784338 is an apocalyptic number.

71131784338 is a deficient number, since it is larger than the sum of its proper divisors (35576772650).

71131784338 is a wasteful number, since it uses less digits than its factorization.

71131784338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3626828.

The product of its digits is 338688, while the sum is 46.

The spelling of 71131784338 in words is "seventy-one billion, one hundred thirty-one million, seven hundred eighty-four thousand, three hundred thirty-eight".