71645505838 has 8 divisors (see below), whose sum is σ = 107470038960. Its totient is φ = 35822159520.

The previous prime is 71645505809. The next prime is 71645505863. The reversal of 71645505838 is 83850554617.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126178 + ... + 399013.

It is an arithmetic number, because the mean of its divisors is an integer number (13433754870).

Almost surely, 2^71645505838 is an apocalyptic number.

71645505838 is a deficient number, since it is larger than the sum of its proper divisors (35824533122).

71645505838 is a wasteful number, since it uses less digits than its factorization.

71645505838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593402.

The product of its (nonzero) digits is 4032000, while the sum is 52.

The spelling of 71645505838 in words is "seventy-one billion, six hundred forty-five million, five hundred five thousand, eight hundred thirty-eight".