83557633620 has 96 divisors (see below), whose sum is σ = 237587212800. Its totient is φ = 21937094784.

The previous prime is 83557633529. The next prime is 83557633631. The reversal of 83557633620 is 2633675538.

It is a self number, because there is not a number n which added to its sum of digits gives 83557633620.

It is a congruent number.

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, 8754811 + ... + 8764349.

It is an arithmetic number, because the mean of its divisors is an integer number (2474866800).

Almost surely, 2^83557633620 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 83557633620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118793606400).

83557633620 is an abundant number, since it is smaller than the sum of its proper divisors (154029579180).

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

83557633620 is a wasteful number, since it uses less digits than its factorization.

83557633620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11797 (or 11795 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 48.

The spelling of 83557633620 in words is "eighty-three billion, five hundred fifty-seven million, six hundred thirty-three thousand, six hundred twenty".