261535402126 has 8 divisors (see below), whose sum is σ = 392305488840. Its totient is φ = 130766905848.

The previous prime is 261535402111. The next prime is 261535402129. The reversal of 261535402126 is 621204535162.

261535402126 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261535402129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183160 + ... + 746068.

It is an arithmetic number, because the mean of its divisors is an integer number (49038186105).

Almost surely, 2^261535402126 is an apocalyptic number.

261535402126 is a deficient number, since it is larger than the sum of its proper divisors (130770086714).

261535402126 is a wasteful number, since it uses less digits than its factorization.

261535402126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795218.

The product of its (nonzero) digits is 86400, while the sum is 37.

Adding to 261535402126 its reverse (621204535162), we get a palindrome (882739937288).

The spelling of 261535402126 in words is "two hundred sixty-one billion, five hundred thirty-five million, four hundred two thousand, one hundred twenty-six".