260656109801 has 4 divisors (see below), whose sum is σ = 260660754900. Its totient is φ = 260651464704.

The previous prime is 260656109759. The next prime is 260656109803. The reversal of 260656109801 is 108901656062.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 108901656062 = 2 ⋅54450828031.

It can be written as a sum of positive squares in 2 ways, for example, as 47282328025 + 213373781776 = 217445^2 + 461924^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-260656109801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (260656109803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2237336 + ... + 2350953.

It is an arithmetic number, because the mean of its divisors is an integer number (65165188725).

Almost surely, 2^260656109801 is an apocalyptic number.

It is an amenable number.

260656109801 is a deficient number, since it is larger than the sum of its proper divisors (4645099).

260656109801 is an equidigital number, since it uses as much as digits as its factorization.

260656109801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4645098.

The product of its (nonzero) digits is 155520, while the sum is 44.

The spelling of 260656109801 in words is "two hundred sixty billion, six hundred fifty-six million, one hundred nine thousand, eight hundred one".