83121556808874 has 16 divisors (see below), whose sum is σ = 170736170743008. Its totient is φ = 26958342748752.

The previous prime is 83121556808839. The next prime is 83121556808947. The reversal of 83121556808874 is 47880865512138.

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, 187210713312 + ... + 187210713755.

It is an arithmetic number, because the mean of its divisors is an integer number (10671010671438).

Almost surely, 2^{83121556808874} is an apocalyptic number.

83121556808874 is an abundant number, since it is smaller than the sum of its proper divisors (87614613934134).

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

83121556808874 is a wasteful number, since it uses less digits than its factorization.

83121556808874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374421427109.

The product of its (nonzero) digits is 103219200, while the sum is 66.

The spelling of 83121556808874 in words is "eighty-three trillion, one hundred twenty-one billion, five hundred fifty-six million, eight hundred eight thousand, eight hundred seventy-four".