83655061220 has 48 divisors (see below), whose sum is σ = 180009717888. Its totient is φ = 32638636800.

The previous prime is 83655061213. The next prime is 83655061249. The reversal of 83655061220 is 2216055638.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 558320 + ... + 692120.

It is an arithmetic number, because the mean of its divisors is an integer number (3750202456).

Almost surely, 2^83655061220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 83655061220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90004858944).

83655061220 is an abundant number, since it is smaller than the sum of its proper divisors (96354656668).

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

83655061220 is a wasteful number, since it uses less digits than its factorization.

83655061220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134580 (or 134578 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 83655061220 in words is "eighty-three billion, six hundred fifty-five million, sixty-one thousand, two hundred twenty".