261662123300 has 144 divisors (see below), whose sum is σ = 602687050560. Its totient is φ = 98330319360.

The previous prime is 261662123297. The next prime is 261662123339. The reversal of 261662123300 is 3321266162.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 239397554 + ... + 239398646.

It is an arithmetic number, because the mean of its divisors is an integer number (4185326740).

Almost surely, 2^261662123300 is an apocalyptic number.

261662123300 is a gapful number since it is divisible by the number (20) 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 261662123300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301343525280).

261662123300 is an abundant number, since it is smaller than the sum of its proper divisors (341024927260).

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

261662123300 is a wasteful number, since it uses less digits than its factorization.

261662123300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2062 (or 2055 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 32.

Adding to 261662123300 its reverse (3321266162), we get a palindrome (264983389462).

The spelling of 261662123300 in words is "two hundred sixty-one billion, six hundred sixty-two million, one hundred twenty-three thousand, three hundred".