261456342132 has 48 divisors (see below), whose sum is σ = 618891259392. Its totient is φ = 85892120160.

The previous prime is 261456342131. The next prime is 261456342151. The reversal of 261456342132 is 231243654162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261456342131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2249683 + ... + 2363045.

It is an arithmetic number, because the mean of its divisors is an integer number (12893567904).

Almost surely, 2^261456342132 is an apocalyptic number.

It is an amenable number.

261456342132 is an abundant number, since it is smaller than the sum of its proper divisors (357434917260).

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

261456342132 is a wasteful number, since it uses less digits than its factorization.

261456342132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116148 (or 116146 counting only the distinct ones).

The product of its digits is 207360, while the sum is 39.

Adding to 261456342132 its reverse (231243654162), we get a palindrome (492699996294).

The spelling of 261456342132 in words is "two hundred sixty-one billion, four hundred fifty-six million, three hundred forty-two thousand, one hundred thirty-two".