83261204603520 has 128 divisors (see below), whose sum is σ = 265447394749440. Its totient is φ = 22198612045824.

The previous prime is 83261204603347. The next prime is 83261204603537. The reversal of 83261204603520 is 2530640216238.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

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, 5477089 + ... + 14018591.

It is an arithmetic number, because the mean of its divisors is an integer number (2073807771480).

Almost surely, 2^{83261204603520} is an apocalyptic number.

83261204603520 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 83261204603520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132723697374720).

83261204603520 is an abundant number, since it is smaller than the sum of its proper divisors (182186190145920).

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

83261204603520 is a wasteful number, since it uses less digits than its factorization.

83261204603520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8546602 (or 8546590 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 42.

Adding to 83261204603520 its reverse (2530640216238), we get a palindrome (85791844819758).

The spelling of 83261204603520 in words is "eighty-three trillion, two hundred sixty-one billion, two hundred four million, six hundred three thousand, five hundred twenty".