71481571438 has 4 divisors (see below), whose sum is σ = 107222357160. Its totient is φ = 35740785718.

The previous prime is 71481571393. The next prime is 71481571439. The reversal of 71481571438 is 83417518417.

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

It is a junction number, because it is equal to n+sod(n) for n = 71481571391 and 71481571400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71481571439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17870392858 + ... + 17870392861.

It is an arithmetic number, because the mean of its divisors is an integer number (26805589290).

Almost surely, 2^71481571438 is an apocalyptic number.

71481571438 is a deficient number, since it is larger than the sum of its proper divisors (35740785722).

71481571438 is a wasteful number, since it uses less digits than its factorization.

71481571438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35740785721.

The product of its digits is 752640, while the sum is 49.

The spelling of 71481571438 in words is "seventy-one billion, four hundred eighty-one million, five hundred seventy-one thousand, four hundred thirty-eight".