261610563001 has 8 divisors (see below), whose sum is σ = 267026371200. Its totient is φ = 256227479280.

The previous prime is 261610562971. The next prime is 261610563047. The reversal of 261610563001 is 100365016162.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261610563001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261610561001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8164966 + ... + 8196943.

It is an arithmetic number, because the mean of its divisors is an integer number (33378296400).

Almost surely, 2^261610563001 is an apocalyptic number.

It is an amenable number.

261610563001 is a deficient number, since it is larger than the sum of its proper divisors (5415808199).

261610563001 is a wasteful number, since it uses less digits than its factorization.

261610563001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16362239.

The product of its (nonzero) digits is 6480, while the sum is 31.

Adding to 261610563001 its reverse (100365016162), we get a palindrome (361975579163).

The spelling of 261610563001 in words is "two hundred sixty-one billion, six hundred ten million, five hundred sixty-three thousand, one".