83121558562218 has 64 divisors (see below), whose sum is σ = 183274472908800. Its totient is φ = 24923312884800.

The previous prime is 83121558562183. The next prime is 83121558562241. The reversal of 83121558562218 is 81226585512138.

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, 15105430 + ... + 19859937.

It is an arithmetic number, because the mean of its divisors is an integer number (2863663639200).

Almost surely, 2^{83121558562218} is an apocalyptic number.

83121558562218 is an abundant number, since it is smaller than the sum of its proper divisors (100152914346582).

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

83121558562218 is a wasteful number, since it uses less digits than its factorization.

83121558562218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34965763.

The product of its digits is 9216000, while the sum is 57.

The spelling of 83121558562218 in words is "eighty-three trillion, one hundred twenty-one billion, five hundred fifty-eight million, five hundred sixty-two thousand, two hundred eighteen".