71808853215 has 32 divisors (see below), whose sum is σ = 127393846272. Its totient is φ = 34245648000.

The previous prime is 71808853177. The next prime is 71808853231. The reversal of 71808853215 is 51235880817.

It is not a de Polignac number, because 71808853215 - 2¹⁴ = 71808836831 is a prime.

It is a super-2 number, since 2×71808853215² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3557191 + ... + 3577320.

It is an arithmetic number, because the mean of its divisors is an integer number (3981057696).

Almost surely, 2^71808853215 is an apocalyptic number.

71808853215 is a deficient number, since it is larger than the sum of its proper divisors (55584993057).

71808853215 is a wasteful number, since it uses less digits than its factorization.

71808853215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7134591.

The product of its (nonzero) digits is 537600, while the sum is 48.

The spelling of 71808853215 in words is "seventy-one billion, eight hundred eight million, eight hundred fifty-three thousand, two hundred fifteen".