261313500674 has 8 divisors (see below), whose sum is σ = 392609682300. Its totient is φ = 130443606576.

The previous prime is 261313500671. The next prime is 261313500703. The reversal of 261313500674 is 476005313162.

It can be written as a sum of positive squares in 2 ways, for example, as 240106860049 + 21206640625 = 490007^2 + 145625^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (261313500671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106570349 + ... + 106572800.

Almost surely, 2^261313500674 is an apocalyptic number.

261313500674 is a deficient number, since it is larger than the sum of its proper divisors (131296181626).

261313500674 is a wasteful number, since it uses less digits than its factorization.

261313500674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213143764.

The product of its (nonzero) digits is 90720, while the sum is 38.

The spelling of 261313500674 in words is "two hundred sixty-one billion, three hundred thirteen million, five hundred thousand, six hundred seventy-four".