83121558717318 has 16 divisors (see below), whose sum is σ = 181356128110656. Its totient is φ = 25188351126440.

The previous prime is 83121558717287. The next prime is 83121558717389. The reversal of 83121558717318 is 81371785512138.

It is a super-2 number, since 2×83121558717318² (a number of 29 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 629708778096 + ... + 629708778227.

It is an arithmetic number, because the mean of its divisors is an integer number (11334758006916).

Almost surely, 2^{83121558717318} is an apocalyptic number.

83121558717318 is an abundant number, since it is smaller than the sum of its proper divisors (98234569393338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

83121558717318 is a wasteful number, since it uses less digits than its factorization.

83121558717318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1259417556339.

The product of its digits is 11289600, while the sum is 60.

The spelling of 83121558717318 in words is "eighty-three trillion, one hundred twenty-one billion, five hundred fifty-eight million, seven hundred seventeen thousand, three hundred eighteen".