261311847013 has 12 divisors (see below), whose sum is σ = 304132534272. Its totient is φ = 223865509560.

The previous prime is 261311846963. The next prime is 261311847067. The reversal of 261311847013 is 310748113162.

It is not a de Polignac number, because 261311847013 - 2²⁵ = 261278292581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261311841013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1286245 + ... + 1475482.

It is an arithmetic number, because the mean of its divisors is an integer number (25344377856).

Almost surely, 2^261311847013 is an apocalyptic number.

It is an amenable number.

261311847013 is a deficient number, since it is larger than the sum of its proper divisors (42820687259).

261311847013 is a wasteful number, since it uses less digits than its factorization.

261311847013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2763672 (or 2763665 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The spelling of 261311847013 in words is "two hundred sixty-one billion, three hundred eleven million, eight hundred forty-seven thousand, thirteen".