71820201201518 has 32 divisors (see below), whose sum is σ = 134321516904960. Its totient is φ = 27980143788960.

The previous prime is 71820201201503. The next prime is 71820201201523. The reversal of 71820201201518 is 81510210202817.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12138698 + ... + 17058381.

It is an arithmetic number, because the mean of its divisors is an integer number (4197547403280).

Almost surely, 2^{71820201201518} is an apocalyptic number.

71820201201518 is a deficient number, since it is larger than the sum of its proper divisors (62501315703442).

71820201201518 is a wasteful number, since it uses less digits than its factorization.

71820201201518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29213072.

The product of its (nonzero) digits is 17920, while the sum is 38.

The spelling of 71820201201518 in words is "seventy-one trillion, eight hundred twenty billion, two hundred one million, two hundred one thousand, five hundred eighteen".