261533575565732 has 24 divisors (see below), whose sum is σ = 466672989501432. Its totient is φ = 128212133587200.

The previous prime is 261533575565683. The next prime is 261533575565791. The reversal of 261533575565732 is 237565575335162.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2563860654436 + 258969714911296 = 1601206^2 + 16092536^2 .

It is a super-2 number, since 2×261533575565732² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1712158319 + ... + 1712311062.

It is an arithmetic number, because the mean of its divisors is an integer number (19444707895893).

Almost surely, 2^{261533575565732} is an apocalyptic number.

It is an amenable number.

261533575565732 is a deficient number, since it is larger than the sum of its proper divisors (205139413935700).

261533575565732 is a wasteful number, since it uses less digits than its factorization.

261533575565732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3424469759 (or 3424469757 counting only the distinct ones).

The product of its digits is 595350000, while the sum is 65.

The spelling of 261533575565732 in words is "two hundred sixty-one trillion, five hundred thirty-three billion, five hundred seventy-five million, five hundred sixty-five thousand, seven hundred thirty-two".