261656241304411 has 8 divisors (see below), whose sum is σ = 265014823601600. Its totient is φ = 258298820956800.

The previous prime is 261656241304307. The next prime is 261656241304439. The reversal of 261656241304411 is 114403142656162.

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

It is a cyclic number.

It is not a de Polignac number, because 261656241304411 - 2¹⁷ = 261656241173339 is a prime.

It is a super-2 number, since 2×261656241304411² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261656248304411) 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, 290034126 + ... + 290934883.

It is an arithmetic number, because the mean of its divisors is an integer number (33126852950200).

Almost surely, 2^{261656241304411} is an apocalyptic number.

261656241304411 is a deficient number, since it is larger than the sum of its proper divisors (3358582297189).

261656241304411 is an equidigital number, since it uses as much as digits as its factorization.

261656241304411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580974789.

The product of its (nonzero) digits is 829440, while the sum is 46.

The spelling of 261656241304411 in words is "two hundred sixty-one trillion, six hundred fifty-six billion, two hundred forty-one million, three hundred four thousand, four hundred eleven".