71808048638 has 8 divisors (see below), whose sum is σ = 107718885288. Its totient is φ = 35901753544.

The previous prime is 71808048577. The next prime is 71808048659. The reversal of 71808048638 is 83684080817.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 71808048638.

It is a congruent number.

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, 1095581 + ... + 1159272.

It is an arithmetic number, because the mean of its divisors is an integer number (13464860661).

Almost surely, 2^71808048638 is an apocalyptic number.

71808048638 is a deficient number, since it is larger than the sum of its proper divisors (35910836650).

71808048638 is a wasteful number, since it uses less digits than its factorization.

71808048638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2270778.

The product of its (nonzero) digits is 2064384, while the sum is 53.

The spelling of 71808048638 in words is "seventy-one billion, eight hundred eight million, forty-eight thousand, six hundred thirty-eight".