261470560651013 has 6 divisors (see below), whose sum is σ = 304159631777766. Its totient is φ = 224117623415112.

The previous prime is 261470560651007. The next prime is 261470560651043. The reversal of 261470560651013 is 310156065074162.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 214133381090209 + 47337179560804 = 14633297^2 + 6880202^2 .

It is not a de Polignac number, because 261470560651013 - 2²² = 261470556456709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261470560651043) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2668066945370 + ... + 2668066945467.

It is an arithmetic number, because the mean of its divisors is an integer number (50693271962961).

Almost surely, 2^{261470560651013} is an apocalyptic number.

It is an amenable number.

261470560651013 is a deficient number, since it is larger than the sum of its proper divisors (42689071126753).

261470560651013 is an equidigital number, since it uses as much as digits as its factorization.

261470560651013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5336133890851 (or 5336133890844 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 47.

The spelling of 261470560651013 in words is "two hundred sixty-one trillion, four hundred seventy billion, five hundred sixty million, six hundred fifty-one thousand, thirteen".