2661481263 has 16 divisors (see below), whose sum is σ = 4056313856. Its totient is φ = 1520575200.

The previous prime is 2661481241. The next prime is 2661481279. The reversal of 2661481263 is 3621841662.

It is not a de Polignac number, because 2661481263 - 2¹⁷ = 2661350191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661481283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210213 + ... + 222513.

It is an arithmetic number, because the mean of its divisors is an integer number (253519616).

Almost surely, 2^2661481263 is an apocalyptic number.

2661481263 is a deficient number, since it is larger than the sum of its proper divisors (1394832593).

2661481263 is a wasteful number, since it uses less digits than its factorization.

2661481263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22614.

The product of its digits is 82944, while the sum is 39.

The square root of 2661481263 is about 51589.5460631318. The cubic root of 2661481263 is about 1385.8231259418.

The spelling of 2661481263 in words is "two billion, six hundred sixty-one million, four hundred eighty-one thousand, two hundred sixty-three".