261657142604314 has 8 divisors (see below), whose sum is σ = 392486337808308. Its totient is φ = 130828363334880.

The previous prime is 261657142604303. The next prime is 261657142604317. The reversal of 261657142604314 is 413406241756162.

It can be written as a sum of positive squares in 2 ways, for example, as 233275067489025 + 28382075115289 = 15273345^2 + 5327483^2 .

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

It is not an unprimeable number, because it can be changed into a prime (261657142604317) 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, 102406147 + ... + 104930134.

Almost surely, 2^{261657142604314} is an apocalyptic number.

261657142604314 is a deficient number, since it is larger than the sum of its proper divisors (130829195203994).

261657142604314 is a wasteful number, since it uses less digits than its factorization.

261657142604314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207967280.

The product of its (nonzero) digits is 5806080, while the sum is 52.

The spelling of 261657142604314 in words is "two hundred sixty-one trillion, six hundred fifty-seven billion, one hundred forty-two million, six hundred four thousand, three hundred fourteen".