261126116532 has 36 divisors (see below), whose sum is σ = 698896372356. Its totient is φ = 81921918720.

The previous prime is 261126116509. The next prime is 261126116567. The reversal of 261126116532 is 235611621162.

261126116532 is a `hidden beast` number, since 2 + 6 + 1 + 1 + 2 + 6 + 116 + 532 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 210301119396 + 50824997136 = 458586^2 + 225444^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 213337719 + ... + 213338942.

It is an arithmetic number, because the mean of its divisors is an integer number (19413788121).

Almost surely, 2^261126116532 is an apocalyptic number.

It is an amenable number.

261126116532 is an abundant number, since it is smaller than the sum of its proper divisors (437770255824).

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

261126116532 is a wasteful number, since it uses less digits than its factorization.

261126116532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426676688 (or 426676683 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

Adding to 261126116532 its reverse (235611621162), we get a palindrome (496737737694).

The spelling of 261126116532 in words is "two hundred sixty-one billion, one hundred twenty-six million, one hundred sixteen thousand, five hundred thirty-two".