260561390109 has 32 divisors (see below), whose sum is σ = 363061440000. Its totient is φ = 166013750784.

The previous prime is 260561390041. The next prime is 260561390129. The reversal of 260561390109 is 901093165062.

It is not a de Polignac number, because 260561390109 - 2⁷ = 260561389981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260561390129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4128412 + ... + 4191050.

It is an arithmetic number, because the mean of its divisors is an integer number (11345670000).

Almost surely, 2^260561390109 is an apocalyptic number.

260561390109 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

260561390109 is a deficient number, since it is larger than the sum of its proper divisors (102500049891).

260561390109 is a wasteful number, since it uses less digits than its factorization.

260561390109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63157.

The product of its (nonzero) digits is 87480, while the sum is 42.

The spelling of 260561390109 in words is "two hundred sixty billion, five hundred sixty-one million, three hundred ninety thousand, one hundred nine".