261302500000 has 192 divisors, whose sum is σ = 648898338816. Its totient is φ = 103572000000.

The previous prime is 261302499979. The next prime is 261302500007. The reversal of 261302500000 is 5203162.

It is a happy number.

261302500000 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (261302500007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 317499589 + ... + 317500411.

It is an arithmetic number, because the mean of its divisors is an integer number (3379678848).

Almost surely, 2^261302500000 is an apocalyptic number.

261302500000 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 261302500000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (324449169408).

261302500000 is an abundant number, since it is smaller than the sum of its proper divisors (387595838816).

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

261302500000 is an frugal number, since it uses more digits than its factorization.

261302500000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995 (or 957 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

Adding to 261302500000 its reverse (5203162), we get a palindrome (261307703162).

The spelling of 261302500000 in words is "two hundred sixty-one billion, three hundred two million, five hundred thousand".